Does it work on iPad 3.2.2 to 3.2.1 downgrade?

Just waiting for feedback before proceeding. It seems quite odd, as a way, a Joe’s comment here above does not put me in the right mood to proceed.

unknown error 11 occured?

would be my quesion too!

it didn’t work either,

Ok, i am now at 4.0.1 and have jailbroken AND installed ultrasn0w and now have my 4.0.1 ssh blobs on sauriks server.

This really really works. Please follow my previous comment if you have any problems.

I would write up a quick guide exactly how i did it but a big outlet probably will in a day or so.

Yes ReekoB, a more detailed guide would be very appreciated as it sounds there is something important in the way you get back the final .ipsw file after the modifications.

We clearly need to be sure that the iPhone discussed did not have any SHSH previosly saved. If not, all the matter is simply not significant.

I’m wondering if the issues do lie within our care to Open instead of Extract… I’m working on this again and adding Reekob’s suggestion with the hosts file stuff…

Here we go…

i used winrar. didn’t work. although i am not very good with computers. so if you do work it out can i please have a dummies guide?

Yeah…. I’m getting error code 3194 everytime. I’ve made sure to use both Winrar as opposed to 7-zip and I’ve tried both the Black recovery screen and the iTunes plug in recovery screen… I’m pretty sure black is DFU, but just in case, I tried both. I also tried with and without saurik’s servers in my hosts file making sure to exit itunes and relaunch after the change.

Still no go. Yet, I get this unsettled feeling that it’s possible that it’s something with the zip process and maybe winrar is killing it, or 7zip is killing. The idea that the .ipsw file needs to be unchanged, makes a good bit of sense. There may be some kind of md5sum or checksum that gets verified by apple that could be broken if the .ipsw file is modified… I don’t know… that doesn’t even make sense, I’m just jabbering.

yes guys, the focus should be:

1 decompress 4.0.1 in one folder and 4.0.2 in another one
2 make modifications indicated above on 4.0.1
3 copy files in the 4.0.2 folder
4 make modifications on dmg files
5 re-compress in a new zip file
6 rename the zip into a ipsw file

I do not know if that is the correct algorithm, that should be clarified

just curious… if this procedure doesn’t require the SHSH to be stored at saurik’s server, then why do we still need to modify the hosts file to point to it?

by pointing to saurik’s server, iTunes basically is checking to see if it can sign 4.0.1 and if it’s not there in the first place… how will it work?

Exactly why I questioned his theory.

I’m using the iPhone 4 and haven’t been able to get it to work yet, that’s why I said that this maybe just for 3gs

yeah i’m thinking that too… also i’m a little confused as there are slight differences between the original blog and this site. The original blog tells you to access the original restore file through c: drive, yet this one tells you to download?

reekob sorry but are you using iphone 4?

Yeah man, I tried that exactly, and even both ways with 7zip and WinRAR and Still no luck…

you can always go back as long as you see your shsh blobs have been stored at the top of Cydia. Still there’s no reason for you to upgrade passed 4.0.1 yet.

It’s on its way. just under 1 hour left :/ Crappy internet, ill post it asap

Lol, i know that – but im pretty sure anyone else in my position would stay put at 4.0.1.

I can try putting a iPhone 4 .ipsw together following the above guide as i did before and upload it if it would help?

wont let tiny umbrella pull mine

You went to advanced options and changed it to the 4.0.1 firmware for your device?
I’m 4 for 4 with this method in the last 2 days.. And even the blog big boss posted at the top as a source.. had the same success.. If u read down one article from his hack

yeah it just told me neither cydia nor apple have my SHSH… i’m on iphone 4, could be why?

Tomorrow, I’m going to try (for the second time) the youtube method… just search “iphone 4 downgrade no shsh” and watch part 2 and part 3… we will see…

if it makes you feel better, at least your not as dumb as me and had it on 2.0.1 and upgraded only to realise the grave mistake you’d made…

I have heard that if you do recompress, as long as you use command line zip (zip -9r file.zip *) it may work.

No go for me, following Reeko’s instructions.

Is there any reason this would work on a 3GS but not an iPhone 4?

Hi ReekoB it sounds that this method is working for you. Can you share your modified 3G’S 4.0.1 firmware to me. Upload and share the link. TIA

Also, i would urge everyone to jailbreak and tap ‘Make my life easier’ in Cydia so upgrading/downgrading in the future is easier!

It is a 4.0.2 firmware bundle, with the 4.0.1 files inside (as instructed) After restoring you will be at 4.0.1.

The only things i did where change the host file (it wouldn’t work without changing the host file) and, obviously, DFU mode restore (DFU mode = blanks screen)

Here is a modified 4.0.2 firmware bundle

db.tt/T5MjgPF

Copy and paste that into your URL bar.

It is a 4.0.2 firmware bundle, with the 4.0.1 files inside (as instructed) After restoring you will be at 4.0.1.

The only things i did where change the host file (it wouldn’t work without changing the host file) and, obviously, DFU mode restore (DFU mode = blanks screen)

This is for the iPhone 3GS not iPhone 4

Can you upload the modified iPhone 4 4.0.1 firmware too?

Thanks for the quick reply ReekoB. But itunes version does matter? or must be latest?

I tried that on iPad and I’m getting 3194 as well

I am downloading the modified version, and I did the modification myself last night, again I get the error the device is not eligible for the requested operation !

Guys, please help… I am in a trip where I can not use my cellphone if it is not jailbroken.
by the way does unlocking an iphone makes me out of contract with Softbank ?

This definitely worked for me. 4.0.2, never jailbroken before and new bootrom.

Just do the host file part and replace the files in 4.0.2 update without extracting that one.

AWESOME workaround!

3gs? iPhone 4?

How ? Apple isn’t signing 4.0.1 anymore.

Exactly dhamien. Some people can’t accept it or don’t understand how it works.

Yes just the standard copy and replace is fine

Im on latest, dont know if it matters.

I both accept it AND understand how it works.

I had no hope for my 3GS 4.0.2 but this did work, and it ONLY worked when i edited the host file.

If you can explain why this happened please go ahead.

Last week i could not restore from 4.0.2 to 4.0.1

Using these instructions and editing my host file enabled me to downgrade to 4.0.1, then i FRESH restored @ 4.0.1 (since my blobs where now on sauriks server as i installed cydia)

yes, your right, it shouldn’t work. But it does.

This is with a 3GS

It doesn’t seem to work with me. I tried these steps, but I still got error 3194.

I’ve followed the instructions. I’m pretty sure i’ve created the ipsw with no issues. My problem is it will not verify the software with apple. I have edited the host file as instructed. Still doesn’t work (which makes since my blobs aren’t saved). This doesn’t work for me. Is there anyway to get out of DFU mode or am I don’t to have to install the 4.0.2 firmware. Thanks.

Ok, can’t believe it either, but it worked perfectly after a few tries with my own 4.0.2 file and FU (no success), and hadn’t noticed that FU commented the line in hosts for Saurik’s server.
Then, with ReekoB’s file, it worked!
I’m using Cydia on it, right now.
Device is a 3GS, btw.

Thankyou!

Can you try ultrasn0w and see if it works for you please? Im getting a carrier name but no signal with 3 sperate sim cards, your the only person that is in my position! If it doesn’t work then it’s something we can report to the dev team for a fix

Oops, Cydia says the device has SHSHs already on file for previous versions down to 3.1.2… As it’s a friend’s iPhone, I didn’t know it might have been jailbroken b4, or Firmware Umbrella’d…
Sorry!

It is plain as day. people that are getting this to work have the shsh’s saved. This entire post should be removed as bogus.

It is clear. It cannot work !!!!

If it works for you, it is because you have shsh on cydia…

Maybe you get refurbished iPhone already jailbreaked in the past without to know it.

NO SHSH, NO DOWNGRAD POSSIBILITY.

EDIT: I also had no SHSH backed up. Miricals do happen!

NO

AFTER DOWNGRADING MY 3GS, CYDIA HAD THE ‘MAKE MY LIFE EASIER’ POPUP – WHICH ONLY COMES UP IF YOU HAVEN’T BACKED UP YOUR SHSH ALREADY.

Reeko Wahts is your iTunes Version!? :)

ty for very fast reply! May u upload ur firmware for megaupload, because the download stops in the midle of process! :) Ty ..

Was your 3GS BRAND new or is there a chance it was reconditioned and at some point in its prior life its internals had been Jailbroken and had its SHSH blobs stored? That might explain why this only seems to work for like 2 people.

exactly

Works perfectly on a 3GS that didn’t have the SHSH backed up. Thanks a million!

My friend was totally bummed last week that he bought a 3GS on 4.0.2 that he couldn’t unlock. He’s very happy now with an unlocked 3GS

Changing the Host file means changing the iTunes Host File? How? To Sauriks Server?
Could you please just edit the file for me (Same Way As you did) but for iPhone 4? Just wanna try it with my dads phone ;)
Thanks

Just to be clear, Cydia confirmed that it wanted to “Make my life easier” and DID NOT have the SHSH on file previously… (for all the naysayers here)

The previous owner was not tech-savvy and had just recently upgraded to 4.0.2 without blinking.

@ReekoB: Thanks for the dropbox link to the already modified firmware. It made this process incredibly easy.

ReekoB,
did you use tinyumbrella to save the unmodified 4.0.2 shsh to saurik’s sever first?

it sounds like this procedure basically imitates a restore to 4.0.2 (hence it looks for the 4.0.2 shsh stored on saurik’s server after you modify the host file), but actually restores to 4.0.1.

that may be why it says step 8 is optional since it’s really just getting the 4.0.2 shsh from apple’s server.

but i don’t see why the restore would work using saurik’s server but not apple’s.

i think the reason why my downgrade wasnt working at first from 4.0.2 to 4.0 was because i didnt edit the host file properly..

i had no shsh backed up because i didnt even know at first i needed to do that lol.

i was up until 5am trying to downgrade getting errors like 3194 and 3002 .. which i think basically means apple were denying my downgrade request.

i didnt even have umbrella open at the time of the downgrade finally working. but ive made sure this time i backed up my shsh : P

obviously i downgraded the ipod touch 3g so might be different for some people.. but god, 2 days finally paid off.. got sick of hearing those kids teling me how to downgrade on youtube lol.

oh yeah i was using itunes 9.2.0.61

9.2.1 (5) OS X

No i didnt use tinyumbrella at all. Last time i tried it wasnt updated for 4.0.2, this 3GS was completely fresh.

I was on the same wave length, step 8 optional, looking to sign official 4.0.2 when its actually 4.0.1 etc. but i dont know why but this went through and works.

I have no idea why it only worked with sauriks server

Can someone upload the firmware to Megaupload,rapdshare or htfile! Pls! :”)

I am uploading it to megaupload now for you all.

Is it worth trying to repackage the iphone 4 .ipsw in the same way and uploading it?

I won’t be able to test it as my iPhone 4 has shsh on file already but if it would help someone else?

ill post a link to megaupload at the top when its done uploading

I can’t say anything with certainty, but there’s a number of ways to store SHSHs on Cydia. Some of them are:

The most obvious one is clicking ‘Make my life easier’ in Cydia and forgetting about it.

Using TinyUmbrella to pull an SHSH from Cydia (if done at /any/ point in time, Cydia will keep getting new SHSH versions for you).

Having done a normal restore at any point on a computer that had its hosts file modified.

Back when you had to manually put ECID into TU, someone can have mistyped and put in someone else’s ECID.

I’m sure there’s a few more, but clicking that button in Cydia, not knowing what it was really is the most probable cause. You have to remember, even now, most people don’t know what SHSH is so it’s likely that they didn’t know what the button did which in turn makes it likely that they don’t remember pressing it. After all, it’s a button that doesn’t do anything when you press it (at least only behind the scenes).

The SHSHs can only be stored while Apple is signing them. If they’re there now, they were there before you downgraded.

He started his post by saying that it was unconfirmed.

By the way, stating that you understand what SHSHs are and how they work doesn’t make it so. It seems you think that the SHSHs you can get are based on which version you’re on, which they’re not.

Ok, a week ago i tried to downgrade – first with the stock host file, to errors. Second – to sauriks server (in the hope the phone had been jailbroken, even though i knew it hadn’t) – to errors.

This method worked and im now at 4.0.1.

Im guessing whatevers happening may be either quite a big, new thing, maybe so simple the dev team have overlooked it, or just a complete freak ’4.0.2 to 4.0.1′ kind of thing.

No, they werent.

Last week i tried downgrading with both the stock + edited host file.

Nothing but errors.

The phone has sat there doing nothing for a week until i saw this guide. It’s now at 4.0.2.

I don’t think you can logically explain what has happened. I understand what your saying, and i know it shouldn’t work – but it has. I feel like im hitting my head against a brick wall with this because i really really really understand where your coming from!

Ye, sure, they where there the whole time. Silly me.

That’s why when i tried to downgrade last week, using both the stock host file and the edited host file (sauriks server) – it through up errors and wouldn’t take it.

Just in case somethings going wrong with the compiling of the firmware on your end, i am going to make the iPhone 4 firmware the same as i did the 3GS and upload it to megupload. It will take a couple hours im afraid but ill post a link on here at the top when it’s ready.

All you should have to do then is edit the host file, dfu mode + restore.

If it doesn’t work then i guess its a 3GS thing only, maybe just a freak thing.

iPhone 4 with 4.0.2, tried few times already, never worked.
Getting 3149 error everytime..

that process is not with SHSHs… is a diferent process friend! :)

OK. We are replacing 4.0.2 files with 4.0.1 (actually with some modifications). After we are trying to restore this custom ipsw with iTunes. In this process, which firmware signs iTunes will ask from apple…? 4.0.2 or 4.0.1 ? ….

anyone knows when 4.1.x comes out?!

Hi people.

Listen up here.
I have done this the last 2 days and this is how it goes.

This process is not working for iPhone 4. It only works for iPhone 3Gs (All versions)
You dont even have to go into those files and chance all kind of stuff.
Just take a iPhone2,1_4.0.1_8A306_Restore firmware and rename is to iPhone2,1_4.0.2_8A400_Restore and then Shift/CTRL restore in iTunes ;)
I’m telling you. I have done it so many times today alone all without SHSH on hold and no use of Umbrella.
The only thing i have is Saurik IP in the host file. Thats it. Nothing els.
Rename the file.

;)

The only thing I can think of in that direction, is if Saurik has, within the last few days, found a way to generate working SHSHs. I find that very unlikely since there’s been no news of it. It’s not a thing where Saurik or the rest of the Dev Team would benefit from keeping it secret. On the contrary, if no one knows about, no one benefits from it.

Just to add, if Saurik did in fact generate working SHSHs, then why not for everyone? Why does it only work for a few people?

I’m waiting for a brand new iP4 which is surely going to be shipped with 4.0.2 and I’m willing to test this – although I doubt it will work.
Did someone meanwhile upload the modified FW for the iP4 to megaupload?

FYI- I picked up a new IPhone 4 today with 4.0.2 at the AT&T store (was sealed in the box) and have not had success performing this downgrade. I am getting error 3194. Tried with and without the hosts file mod. All well, at least this has helped the 3GS’ers!

Running Windows 7 and latest version of ITunes.
~Chris

Great!
It works for me
Just renamed iPhone2,1_4.0.1_8A306_Restore to iPhone2,1_4.0.2_8A400_Restore
and write Saurik IP in the host file

It’s on 4.0.1 again :)

Thanks!

ReekoB: Is it possible that your SHSHs were saved without you knowing, and the reason that it didn’t work last week was that you had to reboot your computer after modifying the hosts file?

We need an exploit released that just allows every 3gs/4 model to be JB’d like the 3G. It is a long time coming. i am surprised that Apple has finally won.

It did not work for me. I guess that the process for the iPhone 3GS and iPhone 4 to get the signature from Apple is different

3GS with 4.0.2 out of the box.

I downloaded the file ReekoB gave a link for, set my hosts file as instructed, DFU and all and I got the iTunes error.

The only thing I can think, is that I did have Umbrella save my SHSH blobs under 4.0.2. Could that kick back the error becasue it detects 4.0.2 from his redirected site? I’m clueless, but I wondered if that may be a problem?

why is it mostly kids giving downgrade advice on youtube :@

I’ve run some tests with my iPhone 4. It does look like this is impossible for those with one.

Using apple for the server, doesn’t work. Using Cydia for the server, doesn’t work. Using TinyUmbrella yields that iTunes is sending a request for 4.0.1, as such, it also does not work.

Sorry to all those iPhone 4 users :(

Worked for me, 3gs. Thanks!

Tried it at work and it didn’t work (windowsXP). Tried it when I got back home
(Windows 7)and here I am with a 4.0.1 useable 3GS that was out of the box 4.0.2! No shsh becase I checked it last night praying it’d been backed up but no go. So… I was a naysayer, but have seen the 4.0.2 downgrade light! I’m happy to help and see if there are any common threads as to why it works on some and not on others.

Yahoo!

That’s my problem as well. I can’t verify with any server since the firmware is taken to be 4.0.1.

I’m beginning to think that in the case of iPhone 4 there are some other places we need to look to replace the 8A306 or maybe leave some files not moved over from 4.0.1…

LOL, I just found a way to do a search for a string through text files (grep “8A306″ `find . -type f`) and didn’t find it anywhere inside 4.0.1 extracted files. Searching for 8A400 found it in 3 places in BuildManifest and 1 place in Restore, as expected. So it’s not the matter of another hidden 8A306.

Things aren’t that simple for iPhone 4… :(

Feels better that I (total novice) can’t get it to work, knowing that you (experienced) also can’t. Thanks for sharing details- hopefully someone will figure out a way to make it happen

Iphone 4… on 4.0.2?

Here’s a thought.. do you restore the current iphone 4 on 4.0.2 to a fresh 4.0.2.. then start?

And why on earth would a different computer make a difference? Different hardware in the computer is going to make no difference… we’re they different OS? Like I’m using win7 and maybe I should try XP.
The network ipv4 and ipv6 architecture is different in xp, making different use of the DNS server different. Although almost all of it is the same

I’m still boggled as it “appears” this to be a validating issue on apples end. But changes in os could make difference. I’ll try on my work laptop.

Don’t keep your hopes up though:P

This method works! I never write in these forums but had to do so. I got a 3gs old bootrom from a friend who does not have a clue about jailbreaking and i am positive that shsh blobs were not stored. I restored in reg mode (not DFU) and have successfully downgraded and used jailbreakme.

i have done every possible combo between the 2 files (4.0.1) and (4.0.2)
the best i got is on the iphone 4
pass apple software check
pass preparing for restore
fails on the restoring software error 21

Possibly we don’t know how SHSHs blob on Cydia really works.
I have an iPhone 3GS:
- old bootroom
- out of the box OS 3.0 FW version
- jailbroke with redsnow
- the “make your life easier” button appeared in Cydia and I hit it. Then, I got SHSHs on file for iPhone OS 3.0; but, later I got SHSH for 3.1 though I never used/restore/upgrade it. Then, I restore to iPhone OS 3.1.2 and jailbroke with blackrain, and later I also got SHSHs for 3.1.3.
Now, I am on iOS 4.0 jailbreak with Snowbreeze and again, I got SHSH for 4.0.1
Note: the “make your life easier” never re-appears and I know nothing about Tiny Umbrella. This confused thing may be useful for others

I have tried everything as well. I think we can confirm that this method DOES NOT WORK for iPhone 4. Sorry.

Apple has not won, the Dev-team has another exploit for jailbreaking (I believe). They are just holding onto it for a little while until FW 4.1 is released which is probably coming in the next few weeks. If they were to release a new jailbreak right now for 4.0.2 Apple would have time to patch that exploit in 4.1 and then we would be right back where we are now.

It WORKS for my iphone 3gs after modifying the “host” file as said above.

Yup, same here, this was a plesent suprise

If you don’t have it already it’ll have 4.0.2 on it. Got mine last week and it has 4.0.2 on it.

Using a similar technique to the one posted up top I believe I may be getting close to having a iP4 version of this working… will keep you posted though :P

Megaupload link

megaupload.com/?d=2LS7PASQ

Copy and paste into url bar

Yep thats my point to….
Never heard about Tiny Umbrella, before I fucked my iPhone 4 up…..didn’t even know that Apple closed for firmware 4.0.1. Did click on “Make your life easier” in Cydia, but was peeeending….Daaam. Now I’m stuck on 4.0.2……I HATE IT!!!! Been jailbreaking for 2½ years now…..so my life is heell now….
Hope someone soon figur out how to downgrade in another whay, Come Fast :-)

I’m one of the many that just got an iphone 4 with 4.0.2 right out of the box. I’m annoyed that this method clearly doesn’t work for iphone 4 (and it has been advertised as a possibility); however, iOS 4.1 will be released very soon and I have absolute confidence that the dev team has an ace in the hole to jailbreak it. In a week from now, we’ll all be wondering why we got so invested in this “hack”.

didnt work for me in iphone 4 oops

You’re kidding, right? You were obviously able to type in English.. so I presume that you are able to read it.

Sorry for trolling.. but jesus..

To clearify:
Downgrading 3GS MIGHT work, for some. Haven’t really found a common denominator for what phones that can downgrade, and which ones that can’t.

However, iPhone 4 WILL NOT DOWNGRADE, unless you have your SHSH blobs for 4.0 or 4.0.1 stored @ sauriks server, in which case this guide is void anyhow.

RECAP:

3GS, MAYBE, With firmware downloaded from URL mentioned in the first few comments
iPhone 4, WILL NOT DOWNGRADE.
Tried every consievable angle to do this, nothing works. Only option so far is waiting for 4.1 (roumored for wednesday 01.september), jailbreak will not be long after. (4.1 betas have been around a long time)

Re: joes reply upgrading 2.1 to 4.2. I have 3GS jail broken 2.1 & want upgrade to 4.1 so I can keep jailbreak and get the 4.1 updates. Can/should I upgrade to ios 4.1?

doesnt work for me :’(

NO, do not upgrade to 4.1 until jailbreak is available. Unless you dont rely on jailbreak/unlock, in which case, go ahead when its released :D

Well in about ba week you’ll be able to tell us what shsh’s Cydia has stored for your device.

Funny thing I found. If I use tiny umbrella with my iphone 4 and select 3gs in advanced options an shsh will be returned by cydia for 4.0.1. unfortunately this doesn’t allow me to downgrade my iphone 4 but it is awful weird that my ECID returns shshs’s for a 3gs.

The funny thing is, all the people who had success by modifying the firmware and then editing the hosts file could have just done what you just did.

Simply edit the hosts file and use vanilla 4.0.1

This totally works on my iPhone 3GS! I successfully downgraded from 4.0.2 to 4.0.

I used an old 4.0 software version, and replaced 8A293 (instead of 8A306) with 8A400.

Apart from that change, I followed the instructions above, and it works wonderfully! Well done everyone involved :)

No, I believe the shsh is a hash of some data on your device taken from your ECID and the firmware version number. The contents of the file can change. In fact, Musclenerd’s last ditch effort actually modifies the ipsw and allows it to restore in this case: http://wikee.iphwn.org/howto:removellb

Here is how Cydia SHSH blob’s work. When Cydia loads, it checks for your device’s SHSH in the system. If you do not have a request at all, it shows the “make my life easier” screen. Only exception is if you said “I hate jailbreaking, go away”. Once you put in an SHSH request, you get an SHSH stored for the current firmware that is being signed. It makes no difference what firmware you are running. You get it for the current firmware being signed. If a user today, on 3.0, requests his SHSH blob, it will be for 4.0.2.

Sometime later, new firmwares come out. Anyone that has ever said “make my life easier” is automatically put into the signing queue by saurik’s server and you will eventually get a signature on file for that firmware. You only have to hit “make my life easier” once in your life.

As for refurbished devices, about 10% of devices are jailbroken. That means if you buy a refurbished device or swap your device for a refurb, you have about a 10% chance that the shsh was already put on file by the previous user.

Ghjjj

You’re on 3gs… Honestly don’t care about people with 3gs lol.

I’m on iphone 4 and have yet to hear a “genuine” success story using this method. Usually they had shsh blobs saved on server and didn’t know.

Not possible on iphone 4…as of yet

Guys,we need to find some method for iPad 3.2.2.maybe somebody have some ideas?

IT WORKS FUCK YEA!!!!!! UNLCOKED AND DOWNGRADED

The 3g will downgrade regardless to whatever you want. It doesn’t use the SHSH files as with the 3GS and I4.

Exactly. It makes sense why they are holding on to it. It just sucks for those of us who need it! :)

Does anyone know if it is possible to downgrade an iPhone 4 on 4.0.2 if it was on 4.0.1 when I bought it. Some people claim it’s possible but I have read hundreds of blogs and I’m yet to see a method as to how.

It is not possible. If you have an iPhone 4 running 4.0.2 and have never saved your SHSH’s with cydia (ie. had the phone jailbroken at 4.0.1) you will not be able to downgrade it as it stands right now.

is this for Iphone4?

No problem. My mom was having a proximity sensor issue and thought it would fix that and did the same thing… We will just have to wait for 4.1 to come out.

We live and learn!

Ive tried it like ten times, with host file without , and nothing, Followed the derections to the core! I have an Iphone4 4.0.2 straight out of the box, beggining to think it will only work with 3Gs? If anyone has any luck with Iphone 4 please help

Very strange: When i delete all blobs in .shsh folder, then open TinyUmbrella, connect my Iphone 3GS, select request from Apple and FW 4.0.1 and hit “Save My SHSH” it says: SHSH SUCCESSFULLY saved! This works for 4.0.2, 4.0.1 and 4.0, but not for 3.1.3 or older Versions. Why is Apple signing old Firmwares for my 3GS right now?

How to change the stupid host files ? Do i change it on Itunes ?or in the Ispw file ? or where ?

Is it working with iPhone 4 with 4.0.2 out of box?

Please please please confirm

Nice Effort ReekoB…did you try to make custom ipsw for iphone 4 ?? i have with 4.0.2 and need to downgrade but dont have SHSH…

can you make same custom ipsw for iphone 4 and send me the link..so ill try with my iphone 4

@ReekoB Just wanted to thank you for posting the file. Worked perfectly!

It is really works for iPhone 4! The phone from USA (locked), was updated to 4.0.2 by me (i was noob in that time).

Yesterday, i saw in umbrella – there was NOT saved shsh!

Due to instructions the iPhone 4 was flashed by this edited firmware. In progress faults an error 1004 and phone switched only in recovery mode. Tiny Umbrella with “Kick device out of recovery” helped to solve that problem!

After that “Activation”, then jailbreaking, then unlocking with ultrasn0w!

Thank you for that method ;)

B.R. brealx

Hi everyone,

I have read all the posts but I still don’t know exactly what to do to downgrade from 4.02(8A400) to a 4.0 in an Ipod touch 8g (MC model). Can anyone write the steps again?

thank you.

let me clarify, i used the file that ReekoB had supplied and it worked like a charm. Thanks ReekoB!

Has any one tried this on iphone 4 ???? im stuck with 4.0.2

iPhone 4 was tried and it WORKS!

There’s a tread on modmyi with video that will show u how to downgrade. I downgraded from 4.0.2 to a 4.0. Works great

How?? Post description, or it didn’t happen!

How is it then, when your SHSH file is pending, is the file lost or what?

BigBoss
Thanks for the update but I can’t understand what editing the hosts file acheives if in fact Apple is signing the 4.0.1 firmware. If your assumptions are correct and Apple is signing them, then editing the hosts file should cause the signature request to fail. I’m stumped because none of this makes any sense except Sauriks server somehow has their shsh’s. I can see this thread growing daily untill 4.1 is released.

Here is a modified 4.0.2 file for the iPhone 4, compiled the same way as the 3GS one I made

megaupload.com/?d=0W41DPGS

Copy n paste into URL bar.

I can’t test this to verify it works, please comment.

16 hours to download? fail

please ReekoB, try to upload to another web site, it’s blocked in my area!!

I am talking about the custome FW for the IP4 on 4.0.2 out of the box??

I will try it and keep the others posted ;-)

Thanks MAN..

Ill try, but lets see =) Get back to you in a couple of minutes!

Lol, I was using dropbox and someone specifically requested megaupload! Had to make an account and everything!!

I’ll upload it to dropbox later.

Try editing the ‘host’ file if it doesn’t work right away see if that makes a difference?

FYI, MegaUpload is reporting this taking 20 hrs to complete the download..

give a link please

Brealx is obviously lying about his iPhone 4 working. He’s the only one, out of hundreds, that have tried this and had it work. He’s just screwing with people.

hucky4444 Says:
August 31st, 2010 at 9:25 pm
Hi everyone,

I have read all the posts but I still don’t know exactly what to do to downgrade from 4.02(8A400) to a 4.0 in an Ipod touch 8g (MC model). Can anyone write the steps again?

thank you.

[Reply]

chucky4444 Reply:
September 1st, 2010 at 7:06 am

PLEASE ANYONE CAN REPLY MY POST? I AM DESPERATE, I NEED TO UNLOCK MY IPOD TOUCH.

THANKS

I just tried and no go. I’m sure you’ll find that when you pressed the save my shsh, the fields were not set correctly, it must have been asking Cydia. Check again because there is no way you got shsh’s for 4.0 from Apple on 31/08 for any 3GS

DownGrade CodeGreen

1. Download iOS 4.0.1 IPSW and iOS 4.0.2 IPSW files

2. Rename the file as .zip and then extract it’s contents using WinRAR to your desktop.

3. In the ios 4.0.1 folder and rename the 018-8229-001.dmg to 018-8380-002.dmg , 018-8235-001.dmg to 018-8393-002.dmg 018-8232-001.dmg to 018-8387-002.dmg.

4. Now open iOS 4.0.2 IPSW file using WinRAR or WinZip. You should be able to double click and open it if you have either of the utilities installed. Do not extract it’s contents, simply open it.

5. Copy all the newly renamed 002.dmg files and the kernelcache.release.n90 files from iOS 4.0.1 folder and drag and drop them into iOS 4.0.2 file opened in WinRAR.

6. Save the iOS 4.0.2 file in WinRAR and change back it’s file extension to IPSW.

File is temporarily unavailable.

I actually tried that very thing last night after trying every modification I could think of. I have an iPhone 4 OOB 4.0.2. It got past the “verifying restore with Apple” and I thought I’d hit paydirt until the dreaded error 21 showed up…

New mirror for the edited iPhone 4 .ipsw

db.tt/3GecCST

copy and paste into URL

Yeah i even renamed the .dmg files to match 402 but got error 21.

BIG :(

Must be a 3GS only thing then. I’ll up a iPad .ipsw later but i doubt it will work.

i’ve now read about people who had saved their shsh now have not got any on file, i did not save my shsh and magically appeared to have them on file – maybe. Very odd things happening right now.

it works for 3GS! thanks Reeko. I had never saved any SHSH’s before

Will really help if the people that succeed specify witch iphone it is !!! 3g 3gs 4 ?!??!??!

itunes says iphone cannot be restored because the firmware is not compatable. this is for the iphone 4 firmware bundle. do you have another bundle ??

Ill repackage the .ipsw for the ipad later and upload it for you.

Give me time please!

I received a replacement 3GS with 4.02 installed yesterday. I tried the tiny umbrella method and (why I have no idea) it DID find a matching SHSH blob. Successfully downgraded to 4.01.

Strange, but amazingly, yes I got lucky and it worked for me.

hey reeko, I have a 3gs and downloaded your custom firmware, changed the host file, put it into dfu mode, but itunes says firmware file is not compatible

Just tried with new iphone 4 shipped with 4.02. Did NOT work. with or without the host file redirect. I get a message that states…
Verifying iphone restore with apple…
Then errors out with…

“The iPhone “iPhone” could not be restored. This device isn’t eligible for the requested build.

make sure that you edit the /etc/hosts file by adding “74.208.10.249 gs.apple.com” to the bottom of the list (in mac its -applications, utilities, terminal- and type “sudo nano /private/etc/hosts” and add “74.208.10.249 gs.apple.com” to the bottom of the list.

and try the 4.0.1 file that is unedited… thats what i used on 3gs (new bootrom) that ran 4.0.2 and it worked… just did it today… when you edit the hosts file it authenticates the firmware with cydia instead of apple..

would downgrading itunes help?

This thing works 100% !!! I REALLY ASSURE YOU! It worked on my 3GS 32 GB. I’ve never jailbroken it before. I used ReekoB custom firmware from the link above!!
For people whom getting not compatible error:You should redownload the firmware and make sure it’s the same size… :)

Thanks everyone.. It’s my LUCKY DAY!!! xD

after 3 days of trying to download ReekoB’s modified file i finally got lucky today…

i downloaded the file and followed the instruction exactly as explained and know my 3gs that’s been sitting there for months is now jailbroken and unlocked to my unofficial carrier..am soo excited rightnow…. thanks to codeblue,thebigboss and Reekob for all the help..nice work guys

Dear Sir, Hereby I Confirmed this method worked on my 3Gs, but I’m not downgrading, it upgrade from 3.1.3(JB) to 4.0.1, tried before to upgrade directly from 3.1.3 to 4.0.1 before using this method but unsuccessful.

Thanks!

Follow the above instructions FULLY and you will be able to successfully downgrade your iPhone 3GS 4.0.2 to 4.0.1 and than you can Jailbreak it.
IDK if it works on iPhone 4,,,havent tried and do not need too cuz my iphone 4 has 4.0.1 on it….but this downgrade method works for 3GS.

it was a swapped out 3GS that was replaced at the apple store 3 days ago, because of a faulty vibrate switch btw. it came out of a box, but may have been a refurbished box

no, not even kind of

Yes, tied but not working… it seems we should wsit :-(

you did everything right, yu just need an activation sim, not your normal network sim but UITS iphone activation sim card or oneSim. search on google, they have distributors everywere. it will help you activate your phone and then you can use your sim.

Okay, so after reading all those comments I am still unsure if this will works on iPhone 3GS? Will somebody please tell me

Yvorobyov
I’m not being rude to Reek0b but if you read the whole thread you’ll realize Reek0b is most definetly not an iphone genius just a guy who got lucky, he’ll admit he has no clue what happened or why. I’m pretty sure that either Apple is selling new 3GS’s with device identification data from 3GS’s that apple have destroyed because they were beyond refurbishing or Apple is selling new 3GS’s with refurbished internals or people aren’t stating that their new 3GS is in fact a refurbished 3GS. The above reasons are the only explanation as to why some 3GS’s are reporting sucsess.

Does anyone know how to see the content of .dmg files?

I just upgraded to the iPhone 4, my shsh is on file, but only at 4.0.2. I’ve tried the steps above without success, however by copying the 001.dmg files into the 4.0.2 .ipsw and renamed the files as follows:

018-8229-001.dmg –>

That’s exactly right. I am merely repacking the firmwares as instructed to save some people the efforts of doing it.

My iPad has SHSH on file so i can repackage + upload one for you all but i can’t promise it will work. The only confirmed cases of this downgrade working are for 3GS so far.

You can’t. Why can’t people get it through their skulls.

Because we would like to JB our phones as well. I understand the frustration of trying to deal with those of us who were not lucky enough to have our shsh on file. I purchased my iPhone two days ago and sadly I’m unable to JB now.

However, there must be a way to do it, it just hasn’t been discovered yet. if you would like to assist in the discovery, I would appreciate your help.

Thanks!

There is no way to downgrade iphone 4 to 401 without blobs. period. Wait for 4.2 and hopefully someone graces us with a jb.

REEKOB POST YOUR PAYPAL I WANT TO BUY YOU A BEER!!!!

Haha don’t be silly pal! Happy enough just helping a few people :)

Now has anyone DOWNGRADED a 3GS and installed ultrasn0w? I can’t get ultrasn0w to work even though it should do (05.13.04 baseband)

seems good in theory, but you are really saying is that if the ipod/iphone was able to be controlled in any other way (non-jailbroken) other than through itunes (bloody itunes. if you were to mod the firmware 4.0.2 in any way like that, because it is designed specifically to p jailbreak it would probably not authorize the restore. And even if you did, this firmware is extremely advanced, and without our whole dev-team to help, it would take one hacher day upon day to make a program that would help them do such a thing. If there is a programmer out there brave enough to create such a program, or agree to use such program to make a stealthed jailbreak, please please help

Hi there, I updated by accident on 4.0.2 and now wanna go on 4.0.1.
Now i’ve got a problem & i hope someone help me. I used reekob file on my 3gs but i am getting an 1611 error. I did the steps with host file, no shsh but nothing…
Did someone had the same problem or knows something…
Thx.

Bull crap DON’T BOTHER IT’S already been proven to not work.

I wasted 3 freaking hours of my life on this. Ask those in the know, does not work

ReekoB – this works!! i was reading this for 2-3 days.. My iPhone 3GS never jail broken before.. did exactly what was told here and now I am using it with non AT&T sim!! awesome post!! thanks to big boss and codeblue…keep the good work up…

yes how….?

For all that tried renaming the dmg files, did you also copy the kernelcache.release.n90 file. I noticed it is of different file size and date between 4.0.1 and 4.0.2. This might be the solution for error 21/

Nah i copied the kernel. once you change anything in the file it becomes a different file and the hash’s don’t match. Once again, this is just impossible on iphone4. dunno why people cant understand that.

Hello everybody!

Im sitting here with a 3gs – Using ReekoB modified IPSW – I can now confirm that it works. Im sitting here with my downgraded iPhone 3gs 4.0.1 now.

Thanks a lot ReekoB!

Anyone sitting somewhere with an downgraded IPhone 4 4.0.1? Maybe I should just give up all hope…

can anyone confirm on the iphone 4?

I tried several things with the iPad firmwares yesterday. but without success.

How far are you reekob with the modified one?

Maybe it’s also not possible.

There has to be a work around with the 4 mofo!!!

Sorry dude, I’ll upload it tonight I promise. I’m on London time and I’ll have it up by 9pm

i tried many ways on iphone 4. i replaced both second and third dmg files from 4.1 into 4.2 seems restore fine but doesnt downgrade. the first dmg which is making problem when replaced. i think if some succeed to work on first dmg may get it done..i wanted to open that dmg with HFSExplorer but its password protected..there are password crackers but dont have time for that.

This reversal does indeed work without ever publishing your SHSH files. I just did this on my 3GS and it worked flawlessly. I am the original owner of the iphone and it has never been jail-broken or unlocked. I downloaded the file ReekOb had modified and then modified my host file. Thank you so much for this workaround!!!

wat is buildmanifest.plist and how do i find this?

yeah keep thinking may be it will work heeeeeeee

ReekoB,did you upload modified firmware?
Thanks

for ipad 3.2.2

Can anyone do another bundle for the iPhone 4. If it can be done for a 3GS it must be possible for the iPhone 4

WOOOOOOOOOOOOOOOOOOOOOW. it worked for me.
I had a replaced (brand new) iphone 3gs and the version was 4.0.2. I didn’t have shsh on file but i could downgrade to 4.0.1.

Al iphone 4 user just forget it, cant you seee it’s a giant Steve Jobs conspiracy to sell us another 3GS? He obviously sold us one and now he thinks we all will drive to the store and buy one before they also have 3 week waiting time for the 3GS, A friend just got his 16 GB and it was 4.0.0 so they obviously want to kick the biggest tech nerds in the balls just to show us who’s boss. I should have gotten a 16GB but what’s a £100 and 32GB is to small since there isn’t any microSDHC option. Only Apple does this every other manufacturer gives us the option just to buy a bigger card but if you want something from Apple you need to buy a new device.

They also thought the ones with 16GB wasn’t going to Jail Break since there isn’t enough space for free apps, they are anyway just buy 2-3 apps at max from Apple anyway. I am quite sure this was what the 3 weeks wait time was about, they all were made with 4.0.0 however they needed to upgrade the antenna problem and why not take care of Jail Breaking to now that it’s legal. Their Legal channels were lost so now they are screwing us instead. It’s about the freedom of choice given to us by God not Steve Jobs, by now he believes he is God so why not take our freedom of choice away? People!!! they are selling Jailed Breaked iPhone 4′s in China, yes I said “CHINA” saw it on you tube, what is happening to the world? Is the bibble true and the Harmageddon will begin in Europe? You in USA could atleast get the phone first, I could get it 1 month ago to however since I live in Sweden I wanted to buy it here. Bought it in the UK anyway since the wating time was a week less but what a hassle since they don’t ship to Sweden so I had to get a UK adress and that not cheap either. and once I get the phone it’s 4.0.2. They literally had to open the package upgrade and put it back between when I ordered it and when I got it. Made my order the 31th of July 4.0.2 didn’t even exist back then, nobody knew. We obviously payed for something else that we wanted and now if we want to Jail break something we need to buy a 3GS with inferior hardware then anything else today. We should go stand together and talk to a lawyer because this can’t be legal. I spent a week of my time trying to find a solution, didn’t do anything I ordinary do whitch means I lost money, a week of my life is worth atleast an iphone if not more. If we wanted a secure phone we would ask for one and we can thanks to third party. We should claim a 4.0.3 Firmware within 3 days witch is already Jailbroken since it’s legal and everything. Or we sue Apple for monatery los and alot of headache, and time is money people. Steve Jobs Isn’t God he should’t be able to screw us like this just because he couldn’t legally. I wouldn’t bought an iPhone if I couldn’t Jail Break it, I would have bought a Samsung Galaxy with Android witch is already liberated. That is what Steve is doing he is puting us all in Jail without a cause even after he lost the trail. We shouldn’t need to make a hack and we should have goten atleast a choice. Apple should get ordered by a judge to open up their servers for us who wants to go back or they have to pay a huge fine for every day they don’t it’s how it usually gets handled. If every person would put one dollar each we could hire a lawyer, the best and he would kick Steve Jobs ass

I KEEP GETTIN A ERROR CODE

I tried these instructions:
1- Downloaded the bundled firmware.
2- Edited the host file (added 74.208.10.249 gs.apple.com)
3-DFU my 3GS iphone.
4-Started thr restore process. I get the error 3014 when itunes trys to verify the restore.

Please help.

Sorry,

do you have also a modified 3.2.2 for iPad??

TYSM

Ric

I’m on a mac by the way running OS 10.6.4 and itunes 9.2.1. I got an error at the very end of the restore saying the restore could not be done. But the white progress bar was at the end of the scale. I used tiny umbrella to kick the device out of dfu mode, the phone restarted. Then I checked the “about” in general settings and it now has 4.0.1 and the device is designated 8A306. I’m waiting for it to setup from my backup and sync, then I’m going to jailbreak.

Does anyone know how to recover a deleted video on an iPhone 4. Deleted some stuff today by mistake and would like to get it back. Really would appreciate the help. Thanks

@Anyone willing to help

I have a new iPhone 3Gs 32 GB out of the box, that was already activated (not by me…)

It is on 4.0.2, so it can not be JB, unless downgraded to 4.0.1.

If I downgraded it to 4.0.1 using the method on this site, will I have to activate the phone again. I am asking because I don’t have the “activation sim-card”.

So if I downgrade I am stuck with an unactivated phone – which is useless…

And if I don’t downgrade I can not Jailbreak, which is a bit less useless… :)

хай, я тут поработал над вашей проблемкой.)олказалось все намного проше!!! зашел в деф, прошиву 4.0.1 переписал как сказанно и нажал востоновить …. и все!!! все работает)

My best suggestion to you is this: If you don’t know what it is how the heck do you have any chance of hacking it-ie:(Fooling Apple system Engineers withy years of exp): Leave it alone untill you research it a little. Better yet wait for 4.1 next week but don’t install it untill dev team gives the go ahead. Good Luck

im stuck with this too just on mac, someone give me directions to this please!

how do u do the host edit i have a 3gs on 4.02 fw

thanks

Jazz,I think Reeko forget about it))))

anyone with iphone 4 hoping to jailbreak it !!
after many hours looking through blogs forums etc on how to do my new 32gb 4.0.2 iphone it seems just waiting till end of week may help.
on weds apple are supposedly releasing 4.1 and theres a cpl of teams already jailbroke it and just waiting for full public release , swo fingers crossed end of week these gods to us iphone lovers will release the jailbreak methods they have done . Thankyou in advance to these geniuses for their time and effort i think !

reekob. When i try and change the hosts file to cydia’s server, it says i don’t have permission to access it. Help meee :( I’ve been trying to downgrade my iphone 4 for like two weeks!

y_rameel@msn.com

yup it dont work 4 mi either.

I tried this on a 3GS which had never been JB before and it worked perfectly – thanks.

hi how did you change the host thanks for any help i have a 3gs new on 4.02 firware
thanks

So I have an iPhone 3gs on 4.0.2. I edited my host file to point at sauriks server and i download ReekoBs prefixed firmware bundle. I DFU’d the device and less than two seconds it says iphone iphone could not be restored because the firmware file is invalid or something like that… Anything I could have missed or something i might have done wrong. Im on a mac and any help would be very appreciated.

On windows the host file can be found here C:\windows\system32\drivers\etc\ or %systemroot%\system32\drivers\etc\, use notepad to edit it.

How do i set up the hosts file guys. i added the line at the end, and set it up perfectly. I am good with computers i have jb several iphones before. I have also downgraded a 3.1.3 3gs to 3.1.2 successfully when it was claimed to be impossible using a similar method. But i still cant get passed itunes usings the other server. Please help. can someone posts up a hosts file they used so i can copy the exact format??? please help

i used both nano and vi. both didnt work for me.

This totally worked on my 3GS and I’m so stoked!

It worked for my iPhone 4! I just shoved it all the way up my bum, jiggled around some dmg files with my sphincter, and tada!! Jailbroken!

……

It’s not working with iphone 4 ,, we have to wait for ios 4.1 and the jailbreak for it

I have a new iPhone with 4.0.2 and I tried doing this and added the ip address into the host file. I’m still getting a 3194 error. anything else I can do?? I’m trying to to be SOL after buying a new phone.

OMG… tbh i thought reekoB was an utter bs’er (no offence).
But after constant reading of this long ass blog i have done it!
Returned my newly brought iphone 3gs 4.0.2 to 4.0.1 The iphone is not a refurb or 2nd hand… brand new out the box! I dont have much tech know how on iphone but i changed the host to saurik’s and it worked! thats the only thing i hadnt done before that was stopping me from downgrading! I have no shsh files… cant explain either (as i dont have a clue) but i thought i would just back him up and say it works! YAY

I had a broken 3GS that I jailbroke (the vibrate switch broke) and got a replacement with 4.0.2 out of the box. I was pissed when I went to jailbreak it and it said firmware was too new… Just used ReekoB’s method and it worked like a charm. Just thought I’d say it’s another confirmation. <3 the internet and many thanks to ReekoB and others for their contributions to society^^

Change the biltmanifest & restor the same way you did 8A306 to 8A400 from 4.0.1 to 4.0.2 and start to work but stays on white screen on iPhone 4 but pass the shsh verification

Anyone who says it doesn’t work, never bothered to mess around with this tutorial. You people are right, yes the way he stated the tutorial it will not work, but I brought a brand new Iphone 3GS, upgraded to 4.0.2 used a portion of this tutorial, and messed around with it a bit on my own, and gues what? I was able to downgrade back down to 4.0.1 without redirecting SHSH request to Cydia. If you really want to know how to do it, just email me at netstep@yahoo.com

can’t that work for ipad i mean downgrade from 3.2.2 to 3.2

how do you change host file

3gs mc model

@Reekob

DUDE I FUCKING LOVE YOU IT WORKED

hey contact me jo on daudi250@hotmail.com i mite help ya out.. cause i had a 3gs no shsh blobs saved and i restored it back to 3.1.3 with the host file….

so the only thing i need to do with this file is press shift restore and selected this file?

what do i do after i changed back the firmware…i think i should be on 4.0.1 now but my sim is stil locked! HELP!

i did all steps one by one but about the last one
**9…..open iTunes and restore the firmware you changed.))
when i conect my iphone to pc itunes gonna restore and update to iOC 4.1 im ean automatically
how to to manual restore the saved firmware (4.0.2)???
i have Iphone 4 iOC 4.0.2 not actived (locked)

Oilra1n is a fake, for me is not working on iphone 4.1

Hi my 3GS iPhone broke and apple replaced it.
They upgraded the firmware to 4.02. Can I downgrade to 3.0? I don’t want to jailbreak it. I just want it back to the way it was.

you need to activate the phone.

Find a software which can hacktivate your phone.

– or –

use a friends sim card who can at&t and working iphone plan.

Once it is activated, you can jailbreak and unlock it @ iOS 4.0.1

hey reekoB i need your help man! i downloaded your file and changed the host and i still get error 3194, what do I do?

Will this work on 3G?

I have a fresh iPhone 4 that shipped with 4.0.2 and this method didn’t work for me. I tried both

(1) replacing everything in the ipsw
(2) replacing everything but the firmware folder in the ipsw.

Neither method met with success. Thankfully, after unplugging my iphone and forcing a home+power reboot, the iphone booted up normally and I didn’t have to re-restore.

It works!! with my iphone 3gs

don’t you pple fucking understand….this will not wokr on IP4!!!

oh and btw
I have an Iphone 3Gs…
Serial # : 880350****
Modem Firmware: 05.14.02 <- this was because I upgraded to 4.1 to look at Game Center… which didnt do anything for me since no one at the time really had it!

Yet I was again able to downgrade to 4.0.1 using th appended host file (add to it that Apple was still signing 4.0.2 Shsh blobs so i was safe to downgrade anyway)

Try download TinyUmbrella
Closing Itunes and all..
matter of fact
Log off your session if your on widows.
Quit itunes if your on your Mac

Log In-
-Run tinyumbrella and turn on TSS server.
Be sure it is being directed to Cydia (click advanced on the top left and the drop down should have Cydia not Apple highlighted)

-Be sure the host file is changed the way its supposed to be (make sure no # sign is in front of the 74.***)

-put your phone in DFU mode

-Open iTunes and Shift+Restore to the modified firmware.

If it still isnt working.
Try repeating the steps on another machine.

It is also possible the file you downloaded wasnt modified correctly OR isnt compatible with your device.
Reread all these pose again to be sure you have the right one.

Hurry before apple figures out this loophole!
It seems like some are having success at different times (one person wrote that they tried it one day and then the next day they did it worked)

Its not a guarantee as BigBoss said- but its a chance!

i have an iphone 3gs , which was restored by accident . When i copy this url db.tt/T5MjgPF , and download the file and restore it , it says the firmware is not compatible . What should i do now ?

this really works. i just got a new iphone 3gs with 4.0.2 and downloaded the modified firmware and it downgraded to 4.0.1

Yup. I have the same problem as “shanth” (comment #298). What can I do? or what am I doing wrong?

Hi ……… I’ve tried this method repeatedly with a 3GS (old bootrom) but it gives the 3194 error in itunes, probably because of the SSHH files in Cydia etc problem. The phone hasn’t been jailbroken before and was upgraded via itunes to 4.0.2. Can anybody help ?

First i tried just like posted here on the site.
Then i tried with tinyumbrella. and nothing worked.
One thing I’m not really shore about is 5. “all files” is the firmware map included here or is it just “files” without firmware map?
I tried that too but it does not work. Really strange that some people seams to get there iPhones downgraded and some don’t :\

I just got a new(refurbished) 3gs from apple! and its on 4.0.2 will this work its was never jailbroken before!

I must say that I am not too good with computers but after reading these instructions, and informing myself on computer lingo, I was able to fix my dads iphone. I was able to downgrade from 4.0.2 to 4.0.1, jailbreak it, unlock it and he’s back on t-mobile with his iphone! Thank you so much! I don’t understand why other people can’t get it to work. Have a great day!

There is much discussion on many blogs about a potential means of downgrading iOS 4.0.2 to 4.0.1 by simply changing a couple values in the buildmanifest.plist and copying all of the images from 4.0.1 into 4.0.2 and then deleting the files ending with 002. Following all of this, perform a DFU restore and somehow you will be on 4.0.1.

There is a perfectly logical explanation for all of this and I will lay out exactly what is happening and explain why it is working for the folks that are the lucky ones.

Let me get this out first.

1.This is not a miracle, at least not in the sense you all hope for
2.SHSHs are STILL required for any iPhone 4, iPhone 3GS, iPad, iPod Touch 3G, and iPod Touch 2G (MC Model)
3.There is NO way around this… unfortunately this method included.
Let me start by explaining something very important. The buildmanifest is used by iTunes to build much of the TSS request that is used to obtain your SHSH for any given firmware revision. Unfortunately, the BuildNumber has no part to play in the request for SHSH. All that you ended up doing in following these directions is request 4.0.1 SHSH blobs. THAT IS ALL. Since every single one of you that got this to work changed your hosts file to point to Cydia, Cydia responded to the TSS request with an SHSH blob that was ALREADY “on-file”. There was no magic. There was no miracle, apart from the lucky break that your device had been put on Cydia’s SHSH request list at some time in the distant past.

That’s it in a nutshell folks. There was no amazing technique for bypassing Apple’s TSS. There was no amazing exploit that exists in DFU mode allowing for 4.0.2 -> 4.0.1 downgrading. It’s simple; Cydia had your SHSH because at sometime in the past either:

•Someone saved your SHSH with that device using TinyUmbrella and the default options
•Someone restored that device with Cydia in the hosts pointing to gs.apple.com
•Someone jailbroke the device and pressed ‘Make my life easier’
That’s it folks. Sorry to be a buzzkill but there was much confusion about this issue and many blog posts that simply didn’t give the full story of what exactly was going on.

THIS GUY IS AWSOME! IT EVEN WORKED 4 NORMAL 3G :D

Is your dads iPhone a Brand New 3gs vth 4.0.2 ???

will this downgrade work for the 3g version as well as the 3gS

does this work on an iphone 3g with 4.1 firmware?
PLEASE HELP

Hi Folks, for those who are still interested to downgrade to IOS401. The idea is to use the current 4.1 shsh from apple server.

1. Download the 4.1 and 4.0.1 ipsw.
2. Extract the all the dmg files from 401.ipsw
3. Example for 3GS Rename the 018-8228-001.dmg to 018-7073-079.dmg , 018-8231-001.dmg to 018-7073-079.dmg and 018-8228-001.dmg to 018-7061-122.dmg.
4. Replace the renamed dmg files into 4.1 ipsw.
5. Proceed to do the itune restorations.

You should see the itunes go pass the apple verifications.

also… quick question.. but um… when you go to restore on Itunes… shouldn’t it have asked me where the file was? I think it just went straight to apple to restore… :(

Just Press shift key and click restore in Itune will ask to browse the file ….

hey guys.. i’m so tired tryin to downgrade my 3gs with fw 4.0.2 to 4.0.1.. and i really tried many ways… with tiny umbrealla with redsnow… it just doesent work… so pleeeeeeeeeeeeeeeeeeaaaaaase helb me… idon’t wanna go to t-mobile again… so once a 3gs.. never jailbroken befor so no shsh files saved .. so can somebody help me… i know that there is going to be a jailbreak for 4.1 soon, but what does ” soon ” mean… are we talking about weeks ..months …or years …so plz help… if you have any advice…..
thanks

How do you change the host? and to what?

THAT DOESN’T WORK ANYMORE :(

I have new iphone 3gs with 4.0.2 and I cannot make it downgraded. I dont have activated sim card. Does this iphone can be downgraded only on activated iphone?

thats great news!!..can you pls tell..ur device..like it is iphone 3gs or iphone 4?? thanks..

tried the above file on my 3gs didn’t work. and I did change the host file and made sure i was in DFU mode. any other ideas on how to down grade to 4.0.2 to 4.0.1. also whats with the 4.1?

if mAc it’s options and restore
and if windows shift and restore..

Well, I did nothing special, I just followed the instructions posted here on the site and made my own firmware. I searched the web for the original Apple FW 4.0.1 and FW 4.0.2 and modified the files according to the instructions.

I think it is the best to make it yourself (it’s easy!), this way you can be sure you did everything correct and don’t need to rely on other’s work.

can u put up a ios for ipod touch 2g mc so i can jailbreak too

Works Fine in 3G i try tiny umbrella

Shift + click on restore..

ive been readin this and am positive! im @ 92% downloaded of the file from the link @ the top of the page!….i will post if this works or not cause i dont believe it either! no offense!

I just tried it and an error message came up saying that the firmware is not compatible… did you have this issue/ do you know how to fix it?

@Rob83

3002 is the error if u havent installed itunes properly or stuff..

cause i was on 4.0.1 and jailbreaked and i had ma SHSH blobs saved.. but what i did was updated ma ipohne 3gs to 4.0.2 and activated via phonebook sim and i made the firmware my self. and i just restored to 4.0.2 the custom one i made through this step and it restored and then i was back on 4.0.1…!! i didnt used tiny umbrella..!

any ways thanks to the owner of the post. it worked for me like a harm on itunes 10… i u need to ask more about it so i can help ya out mail me at daudi250@hotmail.com

hey dude how u restoring ur iphone..?

Will this work using Windows Vista? I have a 3gs phone with upgraded to 4.02, never jail broken. But Id REALLY like to Jail break. I dont care about unlocking it, Im with att.

WOOOOHOOOO!! finally my iphone 3gs new bootrom on 4.0.2 without shsh blobs is downgraded!!! Took a lil while and a few additional steps, bt iv finally manged it!! thanx a million!!!!

@robe
if u can mail me at daudi250@hotmail.com so i can mail u the write up and cause i will be writing one..

not work in iphone 4

hm itunes upgrade it t0 10. and try the steps it will work

Thanks for this manual. I change hosts file, download patched firmware from link at this page, switch iPhone 3GS with FW 4.02 to DFU mode and downgrade to 4.01. IT WORKS!

Join to Rob83. put a step by step guide please. I have 3GS with new bootrom. Itunes give me 3194 error without TinyUmbrella, and 3002 with them. Version of itunes was 9.2.1.4 and 10.0.1.22 now. The same result. File got at the megaupload.com/?d=2LS7PASQ.

The fact that this took you 3 hours just shows how slow you are. My attempt took me all of 15 minutes (editting my own files, not downloading the pre-editted ones), don’t freak out just because it didn’t work.

i had an iphone 4 with 4.0.2 . i wan to downgrade to 4.0.1 but i had try a few ways it doesn.t work ! pls help me eith this . pls email me thnak you

I have same anyway :(

How many mega was the file??? 200 something??

no work anymore!!! case close…

the limera1n Jb is out..go get it guys..i just JB my iphone 3gs FW4.0.2..no shsh blobs…

hi guys, i just jailbreaked my 3gs 4.0.2 new bootroom with limera1n. not jailbroken before. i now unlocked it with ultrasnow. pls try this.

When I tried it for 3gs it says iPhone “iPhone” could not be restored because the firmware file isnt compatable…. i downloaded your like ReekoB

It seems that the iPhone 4 CANNOT be downgraded from 4.0.2 to 4.0.1.
IMPOSSIBLE..
sooooooo. best just leavi guys until they geta jailbreak for 4.0.2

no more sweat and grief and endlessly searching the web for methods to downgrade. IT’S NOT POSSIBLE!!

Hi Pistolpete, there is already a jailbreak and unlock for iphone 4 with 4.0.2 iOS called “limera1n”. you should google it.

I just bought iphone 4 from amazon and thought it was unlocked by sadly it is locked but there is no contract.. Sadly it came with 4.0.2 on it. I tried the SHSH blob thing, and they told me you are too late.. Will this method work for me?? I think it will not but just want some1 to ensure it

pleases help any one i am stuck that problem and i came there i hope you guys can help anyway

my problem is

i did misunderstand upgrade to my iphone 3gs ios 41(8b117)and i try much enough fix my iphone and i did all those thing but i can’t downgrade ???

pleases any one help me pleases i need really help

It could be all the old 3GS phones resold by apple that were turned in. I turned mine in and I’m sure apple reset it and resold it because it was in perfect condition. I had all the shsh backed up and it will always be backed up no matter what apple does. So someone could have gotten my phone and had the shsh blobs already on there.

can you use this for 3G

When I press open to download the firmware it wont let me.! whats the problem?

Works well , downgraded my ipod g2 (mc) from 4.2.1 to 4.0 :DD!!!!!!!!

Couldnt u just doing so when u kick you idevice into recovery u could just recover it at the wanted firmware weather it is jailbroken or not ??? I did that to my friends ipod 3g after i messed up the jailbreak it restored to 4.1 and it just delected everything

Will this work with iPhone 4 iOS 4.2 for downgrade to iOS 4.1???

Worked for my iphone 3gs (old bootrom).

ok ok im really stuck here im on pc and im tryin yo downgrade my iphone 3g but i dont really under stand the 3rd instruction! how do i open the files with note pad !?

I can conferm that this works with my iPod Touch 2G, downgrading from 4.2.1 to 4.0! Yay!

i hav a 3gS and don’t work for me too ¬¬

Downgrade from 4.02 to 4.01 does not work for me. Do you have other way?

does this work on ipod touch 2G??

yea i see wat andrew said and im thinking the same thing

what if itrz to downgrade to 3.1.3

you are the fucking man!

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