General How to downgrade from iOS 6 to iOS 5.1.1

Discussion in 'Jailbreaks and iOS Hacks' started by kmj523, Nov 6, 2012.

  1. kmj523
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    macrumors newbie

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    Jun 25, 2012
  2. cyks
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    macrumors 68020

    cyks

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    Jul 24, 2002
    Location:
    Westchester County, NY
    #2
  3. blair554
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    macrumors newbie

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    Oct 15, 2012
    #3
  4. NathanA
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    macrumors 6502a

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    Feb 9, 2008
    #4
    This is not a universal solution. In fact, there is no universal solution. This only works if you have your SHSH blobs for 5.1.1 saved somewhere for your particular phone. If you don't, you're out of luck.

    -- Nathan
     
  5. dhlizard
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    macrumors G4

    dhlizard

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    The Jailbreak Community
    #5
    It depends on which model you have.

    3GS and iPhone 4 - yes with saved 5.1.1 hash file
    All other models - cannot be done even with saved hash file
     
  6. kmj523
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    thread starter macrumors newbie

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  7. NathanA
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    macrumors 6502a

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    Feb 9, 2008
    #7
    They would only be saved if you explicitly saved them, or if you had previously jailbroken your phone and used Cydia.

    If you didn't know about these files before and so didn't explicitly make an effort to save them before 6.0 was released, or if you have never jailbroken your phone, then you won't have these files. If you did, then you either should know where you saved the files to, or you can fetch them from Cydia's servers using TinyUmbrella.

    -- Nathan
     
  8. Rodster
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    macrumors 68040

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    #8
    How would I save my iPad 2 blobs using iTunes? I want to save them in case I want to JB my iPad 2. :)
     
  9. NathanA
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    macrumors 6502a

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    Feb 9, 2008
    #9
    You can't. You have to use TinyUmbrella, which I linked to in my previous response. TinyUmbrella allows you to download the blobs for your device from Apple for the current version of iOS, as well as any blobs from past versions that you might have saved on Cydia.

    Please note that you can't download the blobs directly from your device for whatever version of iOS it is currently running. So for example, if you are running 5.1.1, and 6.0.1 is the latest version from Apple, and you have never saved your blobs in the past, you can't "rip" copies of the 5.1.1 blobs from your device; the only blobs you can get are the ones that Apple's servers are serving up, which currently are the ones for 6.0.1. That is, you can only download blobs for the latest version from Apple at the point in time that you do the download.

    -- Nathan
     
  10. Rodster
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    macrumors 68040

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    #10
    Thanks, so I take it, it's too late for the 5.1.1 blobs? Any other sources which might have them or are they only available on Apple servers?
     
  11. NathanA
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    macrumors 6502a

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    #11
    Only Apple knows the "secret sauce" (crypto keys) for making the blobs, so once they stop making them for older iOS versions, it is impossible to get them, and thus impossible to restore back to an older version.

    You can't use someone else's blobs because blobs are specific to each phone, based on that phone's serial number. Since they are encrypted, there's no way to modify them.

    -- Nathan
     
  12. kmj523
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    thread starter macrumors newbie

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    Jun 25, 2012
    #12
    My phone is jailbroken and not updated but people want to downgrade back to ios5 so there has to be a file somewhere
     
  13. labman
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    macrumors 604

    labman

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    Mich near Detroit
    #13
    Nope!
     
  14. Rodster
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    macrumors 68040

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    May 15, 2007
    #14
    I've seen links referring to downgrading without shsh blobs. Is that all BS?
     
  15. labman
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    macrumors 604

    labman

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    Mich near Detroit
    #15
    yes
     
  16. Applejuiced
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    macrumors Nehalem

    Applejuiced

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    At the iPhone hacks section.
    #16
    There's links and youtube videos claiming all kinds of stuff.
    Bigfoot, aliens, elvis still alive. You name it:D
    Not everything you will find on the internet is true.
     
  17. labman
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    macrumors 604

    labman

    Joined:
    Jun 9, 2009
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    Mich near Detroit
    #17
    What about mermaids animal planet says there real. So they must be right?
     
  18. Applejuiced
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    macrumors Nehalem

    Applejuiced

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    At the iPhone hacks section.
    #18
    Mermaids are real:D

    [​IMG]
     
  19. Siggen
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    macrumors 6502

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    Apr 1, 2011
    Location:
    Oslo, Norway
    #19
    What if you have an A5 device, all blobs saved (iOS 4.x, iOS 5.x and iOS 6.x blobs), and use the restore function in redsn0w to go from 6.x to 4.x to 5.x ?
     
  20. TriJetHero
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    macrumors 601

    TriJetHero

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    Oct 13, 2010
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    World
    #20
    Only for the iPad2 with blobs from 4.x and 5.x

    Not for the 4S, once at iOS 6 there is (currently) no going back.
     
  21. dhlizard
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    macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
    #21
    Hey, I grew up in Florida.
    Those scales look awfully familiar.
    I think I dated that mermaid :D

    ----------

    Read this blogpost carefully.
    Every nuance about restoring/downgrading is explained.
     

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