iPhone Possible to downgrade from iOS 6 to 5.1.1 and jailbreak again? (iPhone 4S)

Discussion in 'Jailbreaks and iOS Hacks' started by hypotc, Oct 25, 2012.

  1. hypotc macrumors member

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    Mar 7, 2012
    #1
    Hello.

    I'm wondering if it's possible to downgrade from iOS6 to 5.1.1 and rejailbreak the phone. I borrowed the phone from my brother, who had jailbreaked it. When I got it I did a fresh reinstall without jailbreak, and later upgraded to iOS6.

    Has anyone done this?


    Thankful for answers!
     
  2. Intell macrumors P6

    Intell

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    #2
    It is not possible to downgrade an iPhone 4S from iOS 6 to 5.
     
  3. Xcallibur macrumors 6502a

    Xcallibur

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    #3
    I'm fairly sure you can restore an iPhone to any compatible OS providing you have the .ipsw file? I've done it in the past with a 3GS.
     
  4. Applejuiced macrumors Westmere

    Applejuiced

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    #4
    He's talking about a 4S. And you don't just need the ipsw you also need blobs.
    And like intel said its not possible at the moment even with saved shsh blobs.
    You're not as educated on the topic so don't post false assumptions.
    What worked before with another phone model does not work now.
    Apple makes it harder with every hardware and software update.
     
  5. dhlizard macrumors G4

    dhlizard

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    #5
    Yep, Juice is correct.

    Once on iOS6 with a 4S, you cannot go back
     
  6. Xcallibur macrumors 6502a

    Xcallibur

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    #6
    I realise he was talking about a 4S; hence my point ending as a question, it seemed reasonable to assume it may be possible to do what I did to a newer model.
     
  7. Applejuiced macrumors Westmere

    Applejuiced

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    #7
    No. It's not reasonable to assume cause its false.
    If you don't know don't respond cause you're giving him false hope on something that cannot be done currently.
     
  8. Xcallibur macrumors 6502a

    Xcallibur

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    #8
    I don't see how it isn't reasonable to be honest, its by the same manufacturer, running a newer version of the firmware, host to a new set of hardware, simply an update. Generally updates stay to the foundations of their last versions.

    Besides, what is it that stops the downgrade to iOS5 after installing iOS6? Is there a check on the firmware version that only allows the latest iOS to be installed?
     
  9. Applejuiced macrumors Westmere

    Applejuiced

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    #9
    Yes, many many different things stopping it for happen. Like you said newer hardware, firmware and newer security measures. With each update it becomes harder to JB and to downgrade, restore to older firmware etc...
    They dont stay on foundations of last versions, they keep improving security.
    You should learn and research more before responding in similar threads.
    It would be really nice it if was that easy or simple but its not.
     
  10. dhlizard macrumors G4

    dhlizard

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    #10
    It is because unlike the iPhone4 and older devices, the 4S is not susceptible to the Limera1n exploit.

    That is the difference.

    And I agree, if you are not sure about the procedure, one should not post.
    Had the OP tried the downgrade with his 4S, he might have ended up in recovery mode from which there is little chance of escape.

    That's why - guesses can ruin a phone !
     
  11. TriJetHero macrumors 601

    TriJetHero

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  12. hypotc thread starter macrumors member

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    #13
    Thanks for all the answers.

    Anyone know if it will be possible soon? Or should I just wait for a untethered jailbreak for iOS6?
     
  13. dhlizard macrumors G4

    dhlizard

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    #14
    The 4S has been out for over 1 year
    No one has found an acceptable boot level exploit.

    I do not believe it will ever be possible.
     
  14. labman macrumors 604

    labman

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    #15
    not possible on a 4S or with the A5 processor. (still)
     
  15. td1439 macrumors 6502

    td1439

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    #16
  16. Intell macrumors P6

    Intell

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    #17
    That doesn't work on A5 and newer chips. Because the iPhone 4S has an A5 chip, it cannot ever be downgraded from iOS 6 to iOS 5.X.
     
  17. viperGTS macrumors 65816

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    #18
    When the iOS 6 jailbreak is out, you will be able to. But for now you can't.
     
  18. TriJetHero macrumors 601

    TriJetHero

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    #19
    That might not be the case, the devs have to find a new workaround for the current downgrade block by apple. On 5.x it took awhile as well before the A5 devices were able to downgrade
     
  19. dhlizard macrumors G4

    dhlizard

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    #20
    You should read the existing comments on this thread.
    TriJetHero is correct.

    A jailbreak does not automatically ensure downgrades to non-signed firmware will be possible.
    Those are two very different procedures.
     
  20. viperGTS macrumors 65816

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    #21
    You should read the dev team blog.
    He is not correct.

    http://blog.iphone-dev.org/post/31869383801/blob-o-riffic

     
  21. TriJetHero macrumors 601

    TriJetHero

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    #22
    He (I) is..

    Asfand Shabbir ‏@iAsfand
    @MuscleNerd will we every get around this iOS 6 security? I do have saved 5.1.1 blobs but cant downgrade why?
    Expand
    1 Nov MuscleNerd ‏@MuscleNerd
    @iAsfand if it helps any, there were "no downgrade" issues way back on FW 1.x.x too :) (no blobs then either!). It's a cat and mouse game.

    What @musclenerd means is that you are stuck on 6.X without a jailbreak.
    You cannot go back, his remark does not mean the new jailbreak automatically brings a downgrade possibility.


    Btw i think dhlizard has read the DevTeam blog…..
     
  22. gngan macrumors 68000

    gngan

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    #23
    I think you misunderstand that statement. It's saying if you are on iOS 6 then you will have to wait until they release it. It never says anything about downgrading.

    Jailbreaking and downgrading are two different things. Just like jailbreaking and unlocking.
     
  23. dhlizard macrumors G4

    dhlizard

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    #24
    This ^^

    Sadly, that poster is misunderstanding various comments.

    ----------

    Thanks ! Perhaps that poster should check my signature :cool:
     

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