In the last few hours from the public release of the new iOS 5.1 operating system, developers of the iPhone Dev Team strongly recommend anyone who expects to jailbreak, must stay on iOS 5.0.1, especially the owners of iPhone 4S.

Jailbreak iOS 5.1

According to the iPhone Dev Team developers, after public release the iOS 5.1 – you can’t downgrade to iOS 5.0.1. If you are waiting for 04.11.08 Unlock – Don’t Update To iOS 5.1.

Dev Team Does not Recommend to Upgrade to iOS 5.1:

  • Soon after iOS 5.1 appears on Apple’s public servers (when iTunes starts to offer it), Apple will stop signing 5.0.1 SHSH blobs.
  • If you have an iPhone 4S, 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.

Stay turned to UnlockBoot and wait for jailbreak iOS 5.1.

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Stephan Popov
When iDevice users experience problems with the iOS software or unlocking, it is not uncommon for their lives to unravel. My passion is providing answers to your problems. I help iPhone, iPad and iPod Touch users by recommending fixes for common iOS bugs and tools that improves your experience. I conduct in-depth research for every topic i cover on this blog, to ensure that I cover everything Apple users need to troubleshoot their issues. When not writing for UnlockBoot, i enjoy swimming in my backyard pool. P.S. i prefers the Maldives for holidays. Connect with me on Facebook, Google Plus and Twitter.