Yes, you read right. It’s possible to downgrade your iPhone from iOS 5.0.1to iOS 5.0 even if you don’t have your SHSH blobs saved.
With that said, there are some things you’ll want to note before trying this, and it doesn’t work for the iPhone 4S.
Since iOS 5.0.1 has been confirmed to be susceptible to Chronic Dev Team’s untethered jailbreak, I’m not sure if anyone even cares about downgrading at this point, but nonetheless, it’s still pretty cool that you can do this without your SHSH blobs.
How to Downgrade to iOS 5 Without SHSH Blobs
- This doesn’t work for the iPhone 4S.
- This was performed on a Windows machine.
- This requires a tethered boot.
- You can’t go back and save your SHSH blobs.
Things’s You’ll Need:
- RedSn0w (for tethered boot) although you may be successful with iBooty.
- iOS 5 and iOS 5.0.1 firmware files.
You can download all of the above from our downloads page except for 7-Zip, which you can get for free here.
Step 1: Create custom firmwares for iOS 5 and iOS 5.0.1 using Sn0wbreeze.
Step 2: Open iOS 5.0.1 archive using 7-Zip and notate the size and name of the two .dmg files in notepad.
Step 3: Delete the two .dmg files from the iOS 5.0.1 archive.
Step 4: Open iOS 5.0 archive using 7-Zip and extract the two .dmg files.
Step 5: Rename the extracted .dmg files based on the names you notate from the files in step 2. Make sure they are named according to size. See video for more details.
Step 6: Re-open iOS 5.0.1 archive using 7-Zip and copy the two renamed .dmg files into the archive and exit.
Step 7: Place your iDevice into DFU mode, open Sn0wbreeze and run iReb to put the device into PwnedDFU mode for custom restore in iTunes.
Step 8: Open iTunes, and restore using your custom 5.0.1 Sn0wBreeze firmware that you added the renamed .dmg’s to.
Step 9: Boot tethered with RedSn0w. You will need to go to Extras > Select IPSW and point to the original iOS 5.0 firmware then select Just Boot.
Step 10: Once device reboots check General > About and your device should be downgraded to iOS 5.0.
Extra special thanks goes out to unkn0un for tipping us off about this.
What do you think? True, it’s not nearly as compelling as it may have been if theupcoming untethered jailbreak was iOS 5.0 only, but it’s still pretty neat, don’t you think?