Saurik solves the 3.1 downgrade problem for iPhone 3gs users, “the Chosen” few that saved their ECID SHSH.

If you were one of the 50,000 folks that let Cydia store your information for you, you can now downgrade your 3.1 3gs to 3.0 or restore your 3.0 3gs to 3.0 – or downgrade your 3.0.1 3gs to 3.0. Why is this important?

Lets say you are happily on 3.0 jailbroken and you do something to mess things up and need a restore? As I wrote previously, Apple is no longer allowing restore to 3.0. Well, now if you were one of the folks that had cydia store your ECID SHSH information, you can restore and jailbreak.

Saurik writes a great article explaining how to downgrade or restore your 3.0. He also goes into a very interesting discussion (that I totally agree with) about how Apple is mistreating us as a community. It’s a must-read in my opinion even if you don’t have a 3gs. If you do have a 3gs, you want to read this to understand how you can be able to jailbreak forever at least your 3.0 version.

The downgrade steps are at the bottom of his post. I won’t go into too much detail here, but in short here are the steps. (These only make sense after you read his post, which I encourage you to do).

3.0 to 3.0 restore: Add the hosts entry, restore in itunes, jailbreak, you’re done

3.1 to 3.0 or 3.0.1 to 3.0: To downgrade to 3.0, restore in itunes, get error, restore in itunes, get error, use irecovery to boot device, jailbreak.

One last time, read his post for details. Out of well-deserved respect for Saurik, I am not copying the data here.

If you were not one of the few that saved your ECID in Cydia, dont feel too bad. It sounds like there is an exploit for 3.1 and you will be able to save your 3.1 ECID. Just make sure you do it as soon as it is available to do so.