Downgrading 4.0 to 3.1.3?

Discussion in 'iPhone' started by ravensfan55, Apr 9, 2010.

  1. ravensfan55 macrumors 6502

    Joined:
    Mar 16, 2009
    #1
    As easy as option+restore, and selecting the 3.1.3 software? Or is there an additional process needed? I'm not looking to unlock/jailbreak.
     
  2. iLiveUdie macrumors regular

    Joined:
    Feb 19, 2010
    #2
    you would have to download the 3.1.3 software from a 3rf party website.

    Then manually "downgrade" it
     
  3. ravensfan55 thread starter macrumors 6502

    Joined:
    Mar 16, 2009
    #3
    I knew that, just wanted to make sure I know how to do it if things go nuts on me.
     
  4. wingnut8 macrumors 65816

    wingnut8

    Joined:
    Jun 8, 2007
    #4
    you can't just simply manually downgrade it. you'll get an error.
     
  5. unkn0wnsoldier macrumors regular

    unkn0wnsoldier

    Joined:
    Jul 4, 2009
    Location:
    Fountain, Co
  6. ravensfan55 thread starter macrumors 6502

    Joined:
    Mar 16, 2009
    #6
    Didn't Apple stop signing the firmware updates after 3.1.2 so you can't downgrade?
     
  7. ct2k7 macrumors 603

    ct2k7

    Joined:
    Aug 29, 2008
    Location:
    London or Florida
  8. Ron21 macrumors 6502a

    Joined:
    Sep 6, 2007
    #8
    You can downgrade, just follow the instructions in the other thread.
     
  9. wingnut8 macrumors 65816

    wingnut8

    Joined:
    Jun 8, 2007
    #9
    which thread?
     
  10. Ron21 macrumors 6502a

    Joined:
    Sep 6, 2007
    #10
    http://forums.macrumors.com/showthread.php?t=893015

    "here's what i did:

    put 3g into DFU mode
    restored to 3.1.3 in itunes
    loaded irecovery on my mac and ran:
    1. setenv auto-boot true
    2. saveenv
    3. /exit

    held in sleep and home for 10 secs

    phone rebooted and then activated (i have at&t). restored from last 3.1.3 backup prior to loading 4.0

    viola, back to 3.1.3"
     

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