iPhone Downgrade iOS 8.1 to iOS 7.1.2 using SHSH blobs?

Discussion in 'Jailbreaks and iOS Hacks' started by php111, Nov 2, 2014.

  1. php111 macrumors regular

    Joined:
    Jul 31, 2011
    #1
    How to downgrade an iPhone 5S from iOS 8.1 to iOS 7.1.2 using SHSH blobs? This is an iPhone 5S with the Verizon carrier. I "fully" understand you can't do it without blobs because iTunes stopped signing so I am not asking, so how do you do this with blobs?

    BTW, you could request SHSH blobs directly in TU, right?
     
  2. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #2
    Currently is not possible to downgrade an iphone 4S,5, 5C or 5S even if you have blobs saved.
    Only iphone 3GS and iphone 4.
     
  3. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
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    Inside
  4. eyoungren macrumors Core

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    ten-zero-eleven-zero-zero by zero-two
    #4
    Blobs haven't been relevant since iOS 5. They were broken in iOS 6 and as of iOS 7 Apple doesn't use them anymore.
     
  5. php111 thread starter macrumors regular

    Joined:
    Jul 31, 2011
    #5
    Great! Thank you! When you say it is currently is not possible, do you mean it will be some day in the future?

    ----------

    Oh I see. Thank you so much! :)
     
  6. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #6
    Its hard but you never know I guess:D
    I dont want to lose hope but chances are pretty slim.
     

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  7. terraphantm macrumors 68040

    Joined:
    Jun 27, 2009
    Location:
    Pennsylvania
    #7
    The way the current APTicket system works, it's impossible to do a replay attack like we used to in the past. The only way to downgrade would be to bypass the ticket requirement all together. BootROM exploit could do it, but there could also be some creative exploits where a newer iBoot is vulnerable and allows an old firmware to be loaded
     
  8. XboxMySocks macrumors 68020

    XboxMySocks

    Joined:
    Oct 25, 2009
    #8
    Probably not, but its not impossible.

    APtickets are the thing now.
     

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