FutureRestore, a restore tool designed for Apple. If you used TSS saver to save the Blobs while the iOS version is still being signed, download it from the Retrieve section of TSS Saver.ģ. The SHSH Blobs file of the destination iOS firmware. Download it from the official Apple firmware download page.Ģ. Unsigned iOS firmware you want to restore. The prerequisite is that you must have saved the Blobs file for the iOS firmware you want to restore while it was still signed by Apple.ġ. This section will guide you step-by-step through the process of downgrading to an unsigned iOS IPSW with a SHSH Blobs file. Without the Blobs file, you can't downgrade to unsigned iOS. However, even if you downgrade by unofficial restore method, you still need the SHSH Blobs. To restore to an unsigned iOS version, it can only be done unofficially, such as using a third-party tool like FutureRestore. In short, you cannot restore an unsigned version of iOS with iTunes. If one of the firmware is no longer signed, meaning Apple has removed its signature, then the downgrade process will fail. When you use iTunes to switch between two iOS versions, Apple will use iTunes to find the SHSH Blobs to determine if you are downgrading to a signed iOS firmware. It's not possible to downgrade to an unsigned iOS version without an SHSH Blobs. When an iOS user tries to restore their device, one of the functions of SHSH Blobs is to assist Apple to determine whether a signed IPSW firmware file is being used. SHSH Blobs is a part of Apple's digital signature system, which is a piece of code and embedded in each iOS firmware for each iOS device. Part 4: How to Downgrade iOS with WooTechy iMaster? Part 3: How to Install Unsigned IPSW with SHSH Blobs? Part 2: Is it Possible to Downgrade to Unsigned iOS without SHSH Blobs?

How to downgrade to unsigned iOS? Is it possible to downgrade unsigned IPSW without SHSH Blobs? How to install unsigned IPSW without SHSH Blobs? You will find all the answers in this article! Without further ado, let's get started!

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