Restoring iPhone 3GS to older firmware

Discussion in 'Jailbreaks and iOS Hacks' started by dacapo, Jan 18, 2012.

  1. dacapo macrumors 6502

    Joined:
    Jan 25, 2010
    #1
    I did a search but am not sure if I phrased my search correctly, so apologies in advance if there is an easy answer for this.

    Basically, I'm on 4.0.1 JB and I have my SHSH blobs from 3.1.3 all the way up using Saurik's method.

    But, I need to take my phone in to Apple to see if they will replace it. But if they don't (since it's out of warranty), I'd like to stay on a lower iOS version, like 4.3.3, if possible.

    Since it's been over a year since my JB, I just can't remember the details. I'm guessing that I should download an older firmware, and then do a shift (or alt) restore in iTunes.

    Now my question: If I do this, will I be able to take it in to the Apple Store as a clean/non-jb phone, or do I need to just do a clean restore and upgrade?
     
  2. Crystal-RX macrumors 68030

    Crystal-RX

    Joined:
    Dec 22, 2008
    Location:
    Seattle, WA USA
    #2
    Apple still signs 4.1 fw on 3GS. So, you can restore to this firmware. Like you said, shift + restore and point it to 4.1 to restore your phone to factory setting.
     
  3. dacapo thread starter macrumors 6502

    Joined:
    Jan 25, 2010
    #3
    Really? That's awesome news! :D
     
  4. Crystal-RX macrumors 68030

    Crystal-RX

    Joined:
    Dec 22, 2008
    Location:
    Seattle, WA USA
    #4
    Not sure what happens there, but yes, Apple still signs this fw and it helps lot of us. :)
     
  5. dacapo thread starter macrumors 6502

    Joined:
    Jan 25, 2010
    #5
    Thanks, one more quick question.
    Do I still have to put the phone in DFU mode?
     
  6. Crystal-RX macrumors 68030

    Crystal-RX

    Joined:
    Dec 22, 2008
    Location:
    Seattle, WA USA
    #6
    Since you are upgrading, I don't believe you need to put it into DFU, just shift + restore and point it to 4.1, and it will go through. Also, you will not get any error on this upgrading.
     
  7. dacapo, Jan 18, 2012
    Last edited: Jan 18, 2012

    dacapo thread starter macrumors 6502

    Joined:
    Jan 25, 2010
    #7
    Awesome, thanks! :D

    EDIT: Confirmed that it worked. Is 4.1 the only firmware that I can upgrade to on a 3GS, or are 4.2, 4.3 etc a possibility?
     

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