This tutorial will walk you through downgrading your iPhone4S, iPad2 or iPad3 using your previously saved SHSH blobs. If you are an iPhone4S user that unlocks with Gevey, please do not use this method as this method first upgrades your phone to 5.1.1 before downgrading to 5.0.1(which will update your baseband and cause you not to be able to unlock.
First you will need to download 5.1.1 and 5.0.1 IPSW files from here and Redsn0w 0.9.11b1 from here.
Step 1: Download Redsn0w 0.9.11b1 from above. Also download the iOS5 firmware file you wish to downgrade to(5.0.1) and ALSO download the latest firmware available for your device(5.1.1 currently). NOTE FOR 4S USERS: The iPhone-Dev Team forgot to include the 9A406 version of the 5.0.1 firmware in this release, so please download the 9A405 version for now(you will also need SHSH for the 9A405 version). This will be addressed in the next release.
Step 2: Now open Redsn0w and go to and select the new Restore utility which can be found under Extras -> Even More -> Restore
Step 4: After Redsn0w has verified both firmware files you selected, you will then need to select your saved SHSH blob for the firmware you are downgrading to. If your SHSH are saved on Cydia(listed at the top of Cydia) you can simply use the "Remote" option which will pull them from Cyida, otherwise use the "Local" option which allows you to select your TinyUmbrella SHSH blobs directly from your computer.
Step 5: Now this is the great part, after selecting your firmware and your SHSH blobs, Redsn0w will do the rest of the process for you automatically. That's right, no need for iTunes, Redsn0w has the entire restore process built right in. First Redsn0w will install the modified 5.1.1 firmware and then it will downgrade you to 5.0.1.
Step 6: After Redsn0w has completed, that's basically all there is to it. You should now be on a factory 5.0.1 firmware(or whatever firmware you downgraded to) and you can go ahead and jailbreak with Absinthe or jailbreak with Redsn0w, whichever tool you'd like!
First you will need to download 5.1.1 and 5.0.1 IPSW files from here and Redsn0w 0.9.11b1 from here.
Step 1: Download Redsn0w 0.9.11b1 from above. Also download the iOS5 firmware file you wish to downgrade to(5.0.1) and ALSO download the latest firmware available for your device(5.1.1 currently). NOTE FOR 4S USERS: The iPhone-Dev Team forgot to include the 9A406 version of the 5.0.1 firmware in this release, so please download the 9A405 version for now(you will also need SHSH for the 9A405 version). This will be addressed in the next release.
Step 2: Now open Redsn0w and go to and select the new Restore utility which can be found under Extras -> Even More -> Restore
Step 3: Now click the "IPSW" button and Redsn0w will ask you to browse for the IPSW you want to restore. The first IPSW you need to select is the one you ultimately want to end up on. In my case I will be restoring to 5.0.1 so I can jailbreak my 4S so I will select the 5.0.1 firmware first. Immediately after selecting the 5.0.1 firmware, I will then select the 5.1.1(most current firmware) that I downloaded earlier.
Step 4: After Redsn0w has verified both firmware files you selected, you will then need to select your saved SHSH blob for the firmware you are downgrading to. If your SHSH are saved on Cydia(listed at the top of Cydia) you can simply use the "Remote" option which will pull them from Cyida, otherwise use the "Local" option which allows you to select your TinyUmbrella SHSH blobs directly from your computer.
Step 5: Now this is the great part, after selecting your firmware and your SHSH blobs, Redsn0w will do the rest of the process for you automatically. That's right, no need for iTunes, Redsn0w has the entire restore process built right in. First Redsn0w will install the modified 5.1.1 firmware and then it will downgrade you to 5.0.1.
Step 6: After Redsn0w has completed, that's basically all there is to it. You should now be on a factory 5.0.1 firmware(or whatever firmware you downgraded to) and you can go ahead and jailbreak with Absinthe or jailbreak with Redsn0w, whichever tool you'd like!
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