How to Downgrade iOS 5.1.1 to 5.1 / 5.0.1 / 5.0 / 4.3.3

Thanks to hackers who made us can do things that were not available natively by Apple. As usual, and despite the warnings to stay away from any iOS update, many iUsers falling in this trap and hit the silly update button. Anyway, I will show you how to downgrade iOS 5.1.1 to iOS 5.0.1 / 5.1 / 5.0  or whatever version you want in case you have been fed the tethered jailbreak and want to enjoy the untethered jailbreak once again.

For whom this tutorial:

This guide is for iPhone 4, 3GS, iPad 1, iPod touch 4G and iPod touch 3G users who have already saved the SHSH+APTicket for the iOS version you are downgrading your device to. If you didn’t save SHSH+APTicket, you won’t do this now and unfortunately you are out of luck.

Why iPhone 4S, iPad 2 and iPad 3 is not included:

iPhone 4S, iPad 2 and the new-iPad (know as iPad 3) are not included as these devices are not exploitable using Geohot’s Limera1n exploit.

How to downgrade 5.1 to 5.0.1 / 5.0 /  5.1:

Requirements:

• Saved SHSH blobs for the firmware you download to (5.0.1 / 5.0 / 5.1)
• Download iFaith for Windows
• Download iTunes – Windows / Mac
• Download iOS 5.0.1 , iOS 5.0 or iOS 5.1 for your (iPhone, iPad or iTouch)

Step 1: Run iFaith, and choose “Build *signed* IPSW w/Blobs” > “Build IPSW”

Step 2: Now browse the saved SHSH blobs file for iOS 5.0.1 / 5.0 / 5.1.

Step 3: Now browse for the ipsw file of iOS 5.0.1 / 5.0 / 5.1

Step 4: iFaith will cook the custom firmware of 5.0.1 / 5.0 / 5.1 with SHSH blobs.

Step 5: Now from iFaith choose “Use DFU Pwner (iREB)”

Step 6: Finally open iTunes and restore your iDevice to the new custom firmware, that’s it.