Can I downgrade from iOS 6 to iOS 5.1?
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axxo786 • October 21, 2012 at 6:25am
I am currently running iOS 6.0 on my iPhone 4. My previous version was 5.1 and I did not update to 5.1.1 before moving to iOS 6.0. I have the SHSH blobs for iOS 5.1 and would like to know if it is possible to downgrade my device.
Answers
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iClarified • January 12, 2026 at 3:15am
Yes, it is possible to downgrade an iPhone 4 from iOS 6 to iOS 5.1 if you have the SHSH blobs for that specific version. Since the iPhone 4 uses an A4 chip, it is susceptible to a bootrom exploit that allows for downgrades to unsigned firmware versions. You will need to use a tool like Redsn0w or iFaith to stitch your saved SHSH blobs into a custom firmware (IPSW) file. After the custom firmware is created, put your device into Pwned DFU mode and use iTunes to restore the device to iOS 5.1.