During this evening iH8sn0w released version 2.9.2 of the famous sn0wbreeze program with the help of which we can make a custom ipsw that allows us to update to iOS 5.1 keeping the baseband of iPhones intact. The new version of sn0wbreeze unfortunately only does tethered jailbreak, so you will have to use iBooty to restart the iDevices at each restart. An exception to the previously mentioned rule is the iPhone 3GS with an old bootrom that has an untethered jailbreak. Unfortunately sn0wbreeze is useless for those who need to unlock via ultrasn0w because this program is not compatible with iOS 5.1 at the moment and is unusable. Those who have an iPhone 4 and use Gevey for decoding could update to iOS 5.1 because the information I have received so far suggests that these cards work on the new version of the operating system.
- 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'.
Besides the tethered jailbreak option, iH8sn0w solved some of sn0wbreeze's problems and introduced BootNeuter, the unlock solution available exclusively for iPhone 2G. Unfortunately, on iPhone 2G you can only install iOS 3. You can download sn0wbreeze 2.9.2 available here. I remind you of the fact like using this tutorial you can jailbreak iOS 5.1 using redsn0w. Below is an explanation regarding the impossibility of jailbreaking iOS 5.1 iPad 2 and iPhone 4S terminals. In a simple version I will tell you that there is no bootrom exploit and this is impossible.
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.
While the future may always seem to get more narrow... Keep your head high and continue to be open-minded.
