If you have been keeping up with all things iOS as of late, then you should know that Apple has already released another firmware update for iPhone, iPad and iPod touch owners. iOS 5.1.1 itself is not exactly a major upgrade as far as changes and features are concerned. And while it can be jailbroken using the latest version of Redsn0w, it is a tethered jailbreak. Fortunately, there is a way for you to downgrade iOS 5.1.1 to 5.1, 5.0.1 and 5.0. Here's a guide on How to Downgrade iOS 5.1.1 to iOS 5.1 or iOS 5.0.1 Using Redsn0w & iTunes.
Before You Proceed:
- This guide will only work if you have managed to save your SHSH + APTicket for the iOS version that you are intending to downgrade to. Otherwise, you're out of luck.
- This guide will only work for A4 devices which means that if you have an iPhone 4S, iPad 2 or the new iPad, then you have no use for this guide.
- If you rely on an unlock, you must first create a custom IPSW of the firmware that you are planning to downgrade to as this will preserve your unlockable baseband as opposed the upgrading it, thus allowing you to keep your unlock.
Steps on How to Downgrade iOS 5.1.1 to iOS 5.1 or iOS 5.0.1 Using Redsn0w & iTunes:
- Download the latest version of Redsn0w, either for Mac or Windows. Get them here.
- Since we're restoring to an older firmware, it is recommended that you should backup your files via iTunes or iCloud if you don't wish to lose them.
- Launch Redsn0w and connect your iPhone, iPad or iPod touch to your computer via USB.
- Click on Extras > SHSH Blobs > Stitch.
- Now select the IPSW file of the firmware you are intending to downgrade into. You will then have to point Redsn0w to the SHSH blobs + APTicket, provided that you saved them locally. If the aforementioned files are saved in Cydia, you can only access them if your device is placed in DFU mode.
- If your files are saved in Cydia, place your device into DFU Mode, then click Cydia. Redsn0w will now proceed to create the stiched IPSW file.
- Now we need to place your device into Pwned DFU Mode. Go to Redsn0w's main screen, click Extras > Pwned DFU. Just follow the on-screen instructions that will be shown.
- Now you will need to point your host files towards Cydia and fool your device into thinking that Apple has authorized the downgrade. To locate your host file, for Windows: Windows > System 32 > drivers > etc. For Mac, simply navigate to etc.
- Now open the host file and edit them using any sort of text editor and add the following line:
- Now we're off to the restore process. Launch iTunes and hold the left SHIFT key (Windows), or the left ALT key (Mac) and click on the Restore button. Point it to the IPSW that we have stitched earlier and restore. Wait for the Restore process to be completed.
NOTE: In Windows, you may have to run your Notepad in Administration Mode so that you can successfully save the host file after editing.
And that's it, you should end up with a device downgraded to the firmware of your choice. Congratulations! Be sure to checkout our iOS 5.0.1 untethered jailbreak and iOS 5.1 tethered jailbreak guides once you have completed this downgrade iOS 5.1.1 tutorial.Contact Us for News Tips, Corrections and Feedback