Even after lots of warning from hackers,i know many of you had upgraded your devices to ios 5.1.1.but hackers have every solution,thnx to hackers you can still downgrade your device to iOS 5.0.1, 5.0 or 4.3.3.This tutorial will help you enjoy the tethered jailbreak of ios 5.1 or untethered jailbreak on iOS 5.0.
If you an iPhone 4, 3GS, iPad 1 or iPod Touch 4G and 3G owner and already saved SHSH+APTicket for the iOS version you wanna downgrade to then your iDevice is downgradable, but if you haven’t saved the SHSH+ APTicket then I’m afraid to tell you won’t be able to downgrade.
How to downgrade 5.1 to 5.0.1, 5.0 or 5.1:
Step 1: Download iFaith for Window, iTunes for Windows or Mac and Download iOS 5.0.1, iOS 5.1 or iOS 5.0 for you iDevice and make sure you got your saved SHSH blobs for the firmware you want to downgrade to.
Step 2: Run iFaith and choose Build *signed* IPSW w/Blobs then Build IPSW.
Step 3: Click on Browse for SHSH Blobs cache then Browse for the iOS 5.0.1/5.0/5.1 IPSW.
Step 4: Now iFaith will be working on customize the firmware of the iOS you’re downgrading to with SHSH blobs.
Step 5: Now choose Use DFU Pwner (iREB) from iFaith.
Step 6: Once it’s finished, Open iTunes and restore your iDevice the new firmware.
And congrats, you’ve successfully downgraded you iDevice to older iOS and now you can do untethered or tethered jailbreak to your iPhone 4, 3GS, iPad 1 or iPod Touch 4G and 3G.
Remember this won’t work with iPhone 4S, iPad 2 or iPad 3 at the moment.