iH8Sn0w released Sn0wBreeze 2.92 for non-A5 devices to perform a tethered jailbreak of iOS 5.1.
What is New?
- Added Tethered Jailbreak support for 3GS/iPod Touch 3/A4 Users on iOS 5.1 (9B176)
- iPhone 3GS old-bootrom users are untethered on 5.1/9B176 (as usual).
- Bug Fixes (Specifically with the iPad baseband and iPhone 2G).
- Re-added the iPhone Dev-Team's iPhone 2G permanent unlock 'BootNeuter'.
Why is there no A5 support?
A low level (DFU/iBoot/LLB) exploit is required to start the restoration of custom IPSWs. The past two jailbreaks (JailbreakMe & absinthe) for the A5 worked within iOS itself. These exploits are not capable of bringing the iDevice into a state where it will accept custom IPSWs. Therefore, an A5 device cannot currently downgrade to an iOS revision that Apple is no longer signing (even with SHSH blobs) and it cannot preserve the baseband when updating to a newer iOS revision.
Download Sn0wBreeze v2.92 (For iOS 3.1.3, 3.2.x, 4.0.x, 4.1, 4.2.1 to 4.2.8, 4.3 to 4.3.3, 5.0.1, 5.1)