The users who have already jailbroken their iOS 5 based devices in the past, should better stay away from the iOS 5.1 update because the latest update can make the device lose the jailbreak and there is no proper jailbreak available for the new version of iOS. It is better to wait until the Dev Team comes up with any solution and a custom firmware which can be jailbroken in future.
We have shared a tutorial on how to jailbreak iOS 5.1, but we are not sure on how many members would be able to do it successfully and we too have warned the users to do the jailbreak process on their own risk because there is no official word from the Dev team on the jailbreak of the iOS 5.1 firmware version. Apple has launched the new iPad, along with the iOS 5.1 OS version, and the new Apple TV.
As the whole tech world waits for today’s Apple Event, it seems like a good time to remind both veteran and amateur jailbreakers about the fundamental rule of jailbreaking: Avoid firmware updates!
In all likelihood we’ll see the GM “gold master” version of 5.1 this week. DO NOT UPDATE TO 5.1, because you may lose your jailbreak! The rest of this post details the subtleties with this rule, but if there’s only one message to take home, it’s the overall “do not update” message! Now for the nitty gritty exceptions:
Soon after 5.1 appears on Apple’s public servers (i.e. iTunes starts to offer it), Apple will stop signing 5.0.1 SHSH blobs.
If you have an iPhone4S, the basic rule above is really the only rule: you cannot restore back to 5.0.1 once the 5.0.1 signing window is closed, no matter what (even if you saved your SHSH blobs).
If you have an iPad2 with saved 4.x hashes, you can in fact downgrade to that 4.x but you won’t be able to get to 5.0.1 once the 5.0.1 signing window is closed (even if you saved your 5.0.1 SHSH blobs).
If you have a device earlier than the iPad2, you can downgrade to whatever version you want, as long as you have saved SHSH blobs for that version. You’ll need the assistance of geohot’s limera1n exploit with tools like redsn0w to get into “pwned DFU mode” and bypass the downgrade restriction.
As you can see, it really is a nuanced landscape so it’s sometimes hard to drive the message home to new jailbreakers. But the basic rule is the simplest (and it’s better to be safe than sorry!): If you update to 5.1 you’ll very likely lose your jailbreak, so don’t do it! Exceptions are noted above.
Now let’s see what Apple unveils today!