How To Downgrade iOS 5.1.1 to 5.1/5.0.1/5.0 On iPhone,iPad, and iPod touch (A4 Devices)

Looking to downgrade your iOS 5.1.1 device to 5.1,5.0.1, or 5.0, or maybe even 4.xxx? Well listen up because this guide will explain everything you need to know. This is for the iPhone 3GS,iPhone 4,iPad 1, and iPod touch. If you want to downgrade your iPhone 4s/iPad 2,3 than click here and follow the instructions.

Some reasons you may want to downgrade are due to existing errors within jailbreak tweaks due to incompatibility with the newest iOS firmware. Or maybe you aren’t pleased with some updates Apple has placed on your device.

Note One: You will need your SHSH Blobs saved either on your computer, or your device. To check your device for saved blobs, go to Cydia, select the Cydia tab, and look at the very top and you should see “SHSH:” followed with the firmware version you want to downgrade to.

Required: 

-SHSH Blobs for the specific firmware you want to downgrade to.

-The IPSW for the firmware (Download here)

-The latest version of Redsn0w (Windows — Mac)

Now here we begin. Many of you will likely receive errors during the process, but they are sometimes endless and bound to happen. Make a Google search if you need help. 

Step 1: Backup any data that you wish to save. All your music and data will be wiped off upon the restore.

Step 2: Open Redsn0w and make sure your device is hooked up to the computer. Now click ‘Extras’

Step 3: Select ‘SHSH Blobs’ and than go ahead an click on ‘Stitch’

Step 4: Select ‘IPSW’ and find the IPSW on your computer that you downloaded earlier. Now select ‘Local’ and find the SHSH Blobs if they are saved on your computer. If they are saved within your device on Cydia than put your device into DFU mode and click on ‘Cydia’.

Step 5: Your SHSH blobs will now be stitched to your IPSW. A custom IPSW is currently being created, this may take quite a few minutes.

Step 6: Head back over to Redsn0w’s main screen and select Extras >Pwned DFU and follow the instructions on screen.

Step 7: Now you will need to point the hosts file on your computer towards Cydia’s servers. Windows users should head to Windows > System 32 > drivers > etc while mac users simply just head to their >etc folder. When in the etc folder look for your hosts file. Once found, select it and open it up.

Note: Windows Vista/7 users may need to open notepad in administrator mode and browse of the hosts file in order to save correctly.

Step 8: Add the following line below to the hosts file, and save the hosts file. (Make sure its saved in the etc folder)

74.208.105.171 gs.apple.com

Step 9: Finally, launch iTunes, hold down the left SHIFT key (if you’re on Windows), or hold down the left ALT key (if you’re on OS X), and click on the Restore button, select the stitched IPSW file and restore. The process won’t take that long, and in the end you will be presented with a downgraded device on the firmware of your choice.

Thats all. Let us know how the process went. Many may receive errors through the process, and Google is your best friend at solving them. The wide range of errors possible that you could receive are endless, therefore we can’t cover them all.