Yes, you can restore your iOS device to unsigned IPSW firmware。 But not through the traditional way like iTunes. To resolve firmware update errors and problems, reverting to a previous stable iOS version is a common solution. However, new versions of iOS software often cause unpleasant experiences to device performance and functionality. iOS users will not be able to restore to unsigned firmware using iTunes.ĭue to security concerns, Apple will periodically unsign iOS version and encourages users to use the new features offered by new iOS version updates. An unsigned IPSW means Apple has stopped supporting the iOS version. IPSW is the file extension of Apple’s iPhone mobile operating system. Method 3: The Easiest and Fastest way to Downgrade iOS Method 2: Restore Unsigned IPSW by FutureRestore
Method 1: Restore Unsigned IPSW Using SHSH2 Blobs
Part 2: Is It Possible to Restore Unsigned IPSW?
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