My iPhone 3GS is on iOS4 - can I go back to OS 3.1.3?

Discussion in 'iPhone' started by alltheway, Aug 14, 2010.

  1. alltheway macrumors newbie

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    Aug 14, 2010
    #1
    Hello. I've been a long-time viewer, but this is my first post.

    The title says it all really - I'm really hating how iOS4 has slowed down my 3GS and don't see the point of multitasking, so can I go back to OS3?

    I've searched the forums but every question regarding downgrading seems to refer to jailbroken phones. Mine is a straightforward, legit O2-locked iPhone.

    Thanks for any help.
     
  2. Intell macrumors P6

    Intell

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    #2
    Your iPhone still applies to the questions.

    If you have your SHSH blobs on Cydia then yes. If not, no, there is no way to ever go back.
     
  3. kernkraft macrumors 68020

    kernkraft

    Joined:
    Jun 25, 2009
    #3
    Put "CNET+iPhone+downgrade+iOS4" into Google and watch the video. It explains everything. It is basically the matter of retrieving a previous version of the OS and replacing iOS$ with it or downloading an earlier version and doing the same from thereon.

    So yes, you can do it and it's easy, with even OS versions that you skipped. But DO a backup first.
     
  4. alltheway thread starter macrumors newbie

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    #4
    Sorry but I don't understand any part of your reply. My iPhone still applies what to the questions? What are SHSH blobs?
     
  5. Intell macrumors P6

    Intell

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    #6
    No it doesn't, Apple isn't signing 3.1.3 any more.

    Here is an older explanation of what SHSH blobs are and what they do.
    http://www.saurik.com/id/12
     
  6. alltheway thread starter macrumors newbie

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    #7
    Great, thanks. Doing it now.

    (and a cute guy presenting the video - such a bonus!)
     
  7. alltheway thread starter macrumors newbie

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    #8
    Doesn't work. Says Apple won't allow the iPhone to be restored to this 'build'.
     
  8. Intell macrumors P6

    Intell

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    #9
    Correct, there is no way to go back unless you have your SHSH blobs. Which I'm pretty sure you don't.
     
  9. alltheway thread starter macrumors newbie

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    #10
    With the greatest respect, I'm generally ignoring your posts cos they make no sense to me.
     
  10. SpaceKitty macrumors 68040

    SpaceKitty

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    #11
    All you can do now is restore to the current 4.0.2. You have no other choice.
    Why would you ignore him when he is telling the truth?
     
  11. itsmemuffins macrumors 68030

    itsmemuffins

    Joined:
    Jun 23, 2010
    #12
    I have heard people complaining about iOS4 slowing down their 3G, never heard about it happening to their 3GS.

    Have you tried setting it up as new or doing a hard reset?
     
  12. kernkraft macrumors 68020

    kernkraft

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    Jun 25, 2009
    #13
    I've just done this on two iPhones. Mine was a jailbroken 3G running 3.1.2, my girlfriend had her unmolested 3G on iOS 4, the point being that by replacing the relevant file, you can downgrade or do an upgrade to a version other than the latest one.

    When I was doing my research, I read it several times that it also works with the 3GS. Did you download the applications that the video suggested? Without that software running in the background, the restore won't work.

    The lifehacker article is specifically about the 3GS and as I had a quick look at it, it's the same routine.



    EDIT: when you have to press down a key, it is the cmd on newer Macs, the video says 'option' if I remember well.
     
  13. pdqgp macrumors 68020

    pdqgp

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    Mar 23, 2010
    #14
    x2. My 3Gs is quite fast with iOS4. Zero issues. Many apps run faster now.
     
  14. alltheway thread starter macrumors newbie

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    #15
    Because, as I have already explained, his posts make no sense to me.
     
  15. SpaceKitty macrumors 68040

    SpaceKitty

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    #16
    Again, you can no longer go back to 4.0.1 (Apple could still be possibly signing), 4.0 or any firmware 3.1.3 and below.

    Apple is no longer signing the old firmwares. Anyone who keeps trying to do this will be wasting their time. That video at cnet is old. It was released when 4.0 first came out and at that time, Apple was still signing 3.3.1 so it was possible to go back.
     
  16. alltheway thread starter macrumors newbie

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    #17

    You've already told me that.
     
  17. Intell macrumors P6

    Intell

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    #18
    Have you read the entire LifeHacker article?

     
  18. SpaceKitty macrumors 68040

    SpaceKitty

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    #19
    Yes, I have because it looked like you refused to believe it the first time.
     
  19. alltheway thread starter macrumors newbie

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    #20
    Reading back over the thread I can't imagine why you'd think that. Perhaps you're a little paranoid.
     
  20. Intell macrumors P6

    Intell

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    #21
    Perhaps you're a little stubborn.
     
  21. SpaceKitty macrumors 68040

    SpaceKitty

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    #22
    It was also for the person who asked if you had downloaded the files listed in the video, Kernkraft.
     
  22. alltheway thread starter macrumors newbie

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    Aug 14, 2010
    #23
    Of that I am certain.
     

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