Downgrading

Discussion in 'Jailbreaks and iOS Hacks' started by Chazz08, Apr 30, 2018.

  1. Chazz08 macrumors 6502

    Joined:
    Dec 4, 2012
    #1
    I was wondering if there's a way to downgrade to an iOS not being signed any longer. I found some sites that walk through some steps to downgrade without iTunes, but it doesn't say if it will work with unsigned versions. If not, is there a way to get the signature hash for it? I have seen the ways to get those to downgrade, but my iPhone is already past the iOS I want.
     
  2. TiggrToo macrumors demi-goddess

    TiggrToo

    Joined:
    Aug 24, 2017
    Location:
    Out there...way out there
    #2
    In a word, no.

    The longer answer is that it's possibly possible to downgrade if (and only if) your device is already jailbroken.
     
  3. Banglazed macrumors 68020

    Banglazed

    Joined:
    Apr 17, 2017
    Location:
    Cupertino, CA
    #3
    It is only possible if you had saved SHSH blobs which you will need to restore or downgrade to said firmware again in the future even if it is not signed anymore.
     
  4. Chazz08 thread starter macrumors 6502

    Joined:
    Dec 4, 2012
    #4
    That's what I was afraid of. I'm guessing the SHSH blobs are specific to each phone? I didn't know if I could get another iPhone X that hasn't been updated to the latest OS and use those blobs or not.
    --- Post Merged, May 1, 2018 ---
    Well bummer. haha. Thanks! Guess I'll be waiting a lot longer.
     
  5. eyoungren macrumors Core

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    ten-zero-eleven-zero-zero by zero-two
    #5
    Yes. It's an encrypted hash between the specific device and Apple. Which also means you cannot use anyone else's blobs to downgrade.

    Yeah, the whole process has to start with that because it all relies on the phone already being jailbroken.

    Or put another way, you can't do what you want until you first break out of Apple's jail.
     
  6. Chazz08 thread starter macrumors 6502

    Joined:
    Dec 4, 2012
    #6

    Well, here's hoping the next jailbreak comes out sooner rather than later.
     

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