Download FutureRestore from this Github page.Īssuming you already have the SHSH blob file of the firmware you want to restore to, follow the steps below to downgrade to unsigned iOS IPSWs with the blob file. FutureRestore, a restore tool designed for Apple users. If you used TSS Saver to save the blob while the iOS version is still being signed, download it from the Retrieve section of TSS saver.ģ. The SHSH blob file of the destination iOS firmware. Download it from the official Apple firmware download page.Ģ. Unsigned iOS firmware you want to restore. Wondering about how to restore unsigned IPSW? This section will walk you through the step-by-step process required to move back to an unsigned iOS.ġ. Without the blob file, you can’t downgrade to an iOS that is no longer signed by Apple. The blob file is required to fool Apple’s server when restoring through unofficial restore methods, and it must have been saved while the particular unsigned iOS version is still being signed by Apple. To make the unofficial transition, however, you’ll still need the SHSH blob for the unsigned firmware and for your device. Restoring to an unsigned iOS version can only be done through unofficial means, such as the use of third-party tools like FutureRestore. Simply put, you can’t restore an unsigned iOS version with iTunes. If one of the firmware is no longer signed, meaning Apple has removed its signature, the downgrade process will fail. If you want to move between two iOS versions, Apple with the help of iTunes will look for this piece of code (SHSH blob) to determine if you’re switching between signed iOS firmware. They also make up a critical part of the iOS Apple signing system. Once installed, any iOS firmware carries a piece of code (or digital signature) many users refer to as SHSH blob. It's not possible to move back to an unsigned iOS without an SHSH blob. Is It Possible to Downgrade to Unsigned iOS without SHSH Blobs? How Do I Revert Back to iOS 13 from iOS 14 without A Computer? What Does It Mean If IPSW File Is Not Signed Anymore? Is There A Way to Downgrade to an Unsigned iOS Version? Part 3: How to Downgrade iOS with WooTechy iMaster Part 2: How to Downgrade to Unsigned iOS with SHSH Blobs Part 1: Is it Possible to Downgrade to Unsigned iOS without SHSH Blobs?
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