iPhone 3G Downgrade iPhone 3G from iOS4?

Discussion in 'iPhone' started by thehellraiser, Jul 22, 2010.

  1. thehellraiser

    thehellraiser New Member

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    Is it possible to downgrade an iPhone 3G from iOS4 to 3.1.2? If so, how?
  2. leadergo

    leadergo Active Member

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    Yes. Use an older version of iTunes, like iTunes 9.1 and Shift-Restore to 3.1.2.
  3. CBTOUCH

    CBTOUCH New Member

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    I've just downgraded mine to 3.1.3 from 4.0. I used the itunes 9.2. Shift restore to 3.1.3. You will most likely get the '1015' error. Ignore the error and close itunes. Run 'iReb' to get it out of recovery mode. I then jailbroke using 'redsnow' and unlocked using 'ultrasn0w' from cydia.

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  4. brooklynblaze

    brooklynblaze Member

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    Does this work?
  5. moshonas

    moshonas Member

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    This should work, as the error would restore it, but send it into recovery mode because it wants you to use iOS4, but use the program he suggested above, or for mac use RecBoot.

    These two peices of software will take your device out of recovery mode, and are useful if you mess your device up.
  6. brooklynblaze

    brooklynblaze Member

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    I got out of recovery mode but now how do i jailbreak with redsnow? It says ispw firmware not recognized when trying to jailbreak 3.1.3
  7. ripply

    ripply Active Member

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    Use redsn0w 0.9.4 and select the 3.1.2 FW
  8. brooklynblaze

    brooklynblaze Member

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    Ok thanks
  9. j0sh818

    j0sh818 New Member

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    I had the same issue when I downgraded from 4.0.1 to 3.1.3 on my 3G. It took me almost a day to figure it out. Wish I had read this thread. thanks!

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