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 Install Unsigned IPSW without SHSH Blobs? Part 3: How to Install Unsigned IPSW with SHSH Blobs? Part 2: Can I Downgrade to Unsigned iOS without SHSH Blobs? Wanna downgrade to unsigned iOS? How to get SHSH blobs if not saved? Does it possible to restore unsigned IPSW without SHSH blobs? Your search ends here! This complete guide will tell you all the answers! Scroll down to read it!
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