Earlier today we told you that the iPhone Dev-Team released their downgrading solution for the iPhone 4S, the new iPad and also the iPad 2. It came in the form of RedSn0w 0.9.11b1 and will allow those that accidentally updated to the iOS 5.1 or iOS 5.1.1 firmware to downgrade back to the iOS 5.0.1 firmware for an Untethered Jailbreak. As such in this how to guide we will be covering how to downgrade your iPhone 4S, new iPad or iPad 2 from iOS 5.1.1/iOS 5.1 to the iOS 5.0.1 firmware using the Mac OS X version of RedSn0w 0.9.11b1. Before we start however, make sure you meet the requirements listed below:
- Saved SHSH blobs for the iOS 5.0.1 firmware
- You DO NOT rely on an unlock that requires you to have a certain baseband version (this method will update your iPhone’s baseband)
As long as you have saved SHSH blobs and do not rely on an unlock for your iPhone 4S you can easily use RedSn0w 0.9.11b1 to downgrade your A5 iOS device.
Note #1: If you are on the Windows operating system please click here to follow the Windows version.
Downgrade A5 Devices With RedSn0w 0.9.11b1
Note: The iPhone Dev-Team left out one version of the iOS 5.0.1 firmware in RedSn0w 0.9.11b1. Thus, when downloading the iOS 5.0.1 firmware make sure it is build 9A405.
Step 1) – The first thing you will need to do is download RedSn0w 0.9.11b1 for Mac OS X. This can be done by going to the iJailbreak Downloads Section or by using one of the direct links shown below:
Download RedSn0w 0.9.11b1 (Mac OS X)
You will also need to make sure you have both the iOS 5.0.1 (9A405) firmware and iOS 5.1.1 firmware downloaded to your computer for the A5 device you are trying to downgrade. For those that need to download these iOS firmware files you can turn your attention to the iJailbreak Downloads Section.
Step 2) – With all the required files downloaded you will need to put your A5 iOS device in DFU mode. For those of you who do not know how to do this you can click here.
Step 3) – The next thing you will need to do is simply launch RedSn0w.
Step 4) – With RedSn0w up and running go into the Extras menu.
Followed by the Even More menu.
And finally the Restore menu.
Step 5) – From here you will need to select your iOS 5.0.1 firmware file, followed by your iOS 5.1.1 firmware file by clicking the IPSW button.
Step 6) – After your firmware files have been successfully verified you will need to turn your attention to the Blobs section. For those of you who Jailbroken your A5 iOS device in the past and saved your SHSH blobs via Cydia you can simply click the Remote button. If you have not saved your SHSH blobs via Cydia however, but rather with a tool like TinyUmbrella, then you will need to click the Local button and locate them on your computer.
Step 7) – Ater your SHSH blobs have been verified you will simply need to sit back and wait for your A5 iOS device to be downgraded. This process can take over 10 minutes, so be patient and do not disturb your device during the restoration/downgrade process.
Congratulations! Your A5 iOS device should now be running the iOS 5.0.1 firmware. The next thing you will most likely want to do is Jailbreak your iPhone 4S or iPad 2 Untethered running the iOS 5.0.1 firmware. We will have updated how to guides in the near future, but until that time please visit iJailbreak’s How To Jailbreak Section. If you have any further questions or thoughts you can turn your attention to the comments section below…