Can you do a restore at 3.1.2

Discussion in 'Jailbreaks and iOS Hacks' started by thundermustard, Mar 19, 2010.

  1. thundermustard macrumors regular

    Joined:
    Apr 21, 2008
    #1
    Jailbroken but not unlocked 3GS at 3.1.2
    Can I do a restore and stay at 3.1.2 or will Apple say I have to upgrade?
    So far so good, but you know a jailbroken iPhone can get fussy after a while. Just preplanning.
     
  2. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #2
    If you have saved your 3.1.2 SHSH (either on Saurik's server through Cydia or locally through Umbrella), then it is possible to restore to 3.1.2; otherwise, it is not. There are already several threads about this very issue on the first page of this thread.
     
  3. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #4
    You cannot restore a 3GS to anything but the latest 3.1.3 firmware unless its JB with an untethered JB or has its SHSH's saved thru cydia or locally.
    What you suggested will not work so try not to give advice on something that you're not positive about.
    What you suggested would work on a 2G and 3G model but not on 3GS units.
     
  4. aaron11193 macrumors regular

    aaron11193

    Joined:
    Mar 27, 2009
    Location:
    Karumba/Cairns/Charters Towers, QLD, Australia
    #5
    Damn, things are not so simple anymore :S

    What is SHSH btw?
     
  5. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #6
    Lol :)
    Not as simple as before.
    Here's what and how SHSH's work: http://www.saurik.com/id/12
     
  6. labman macrumors 604

    labman

    Joined:
    Jun 9, 2009
    Location:
    Mich near Detroit
    #7
    obvously

    Apple is working harder to prevent jb and unlocking so we have to be way more careful! ;) I'm guessing it's gonna get worse! I hope 4.0 is awesome! :rolleyes:
     
  7. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #8
    In case anyone is curious, SHSH stands for signature hash.
     
  8. AlexTheMan macrumors newbie

    Joined:
    Mar 1, 2010
    #9

    I would appreciate any help regarding the above issue. You menetioned "unless its JB with an untethered JB."

    A freind has a 3gs that is untethered JB'ed with Redsnow and unlocked with Blackrain. SHSH is NOT saved through Cydia.

    Now, his phone crashed. How can he restore it to 3.1.2?

    Thanks a million.
     
  9. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #10
    If it was JB with an untethered JB then he can restore it thru itunes to official 3.1.2 and then JB it again with Redsnow and unlocked with blacksnow.
     
  10. tmatthews14 macrumors regular

    Joined:
    Feb 12, 2010
    Location:
    Utah
    #11
    I would've guessed NO. But I'm not doubting your call... But do you mind explaining why? I would've thought he would have to go to 3.1.3, since there are no 3.1.2 SHSH's saved.

    Could you just explain how he could go to an official 3.1.2?
     
  11. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #12
    When you have the old iboot untethered and your device is already JB it doesnt even check for the SHSH's thru Apple for verification.
    It just lets you install it.
    On the other hand if it was tethered it wouldnt be possible.
     
  12. tmatthews14 macrumors regular

    Joined:
    Feb 12, 2010
    Location:
    Utah
    #13
    Alright. So if the phone is already pwned (lets say its on 3.1.3 jb), you can safely downgrade to a 3.1.2 custom fw IF its the old bootrom?

    I wish I completely understood all this. I think I was unfortunate to upgrade to a 3gs at the same time apple stopped signing <3.1.3 fw's. So I've had to learn the difference between tethered/untethered jb's, SHSH's, etc... Baaaaaad timing on :apple:'s part ;)

    Thanks for the explanation.
     
  13. AlexTheMan macrumors newbie

    Joined:
    Mar 1, 2010
    #14
    Thanks for the reply. We'll give it a try.
     
  14. AlexTheMan macrumors newbie

    Joined:
    Mar 1, 2010
    #15
    Well. It didn't work. I got the message that the phone is ineligible.
     
  15. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.

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