Downgrading an old iPhone 3G from 4.2.1 to 3.1.3?

Discussion in 'Jailbreaks and iOS Hacks' started by eobet, Mar 19, 2012.

  1. eobet macrumors member

    Aug 11, 2009
    So iOS 4 never got back the speed it had from iOS 3 on my old phone, and I can't buy a new one anytime soon, so I'm figuring that downgrading is the best option to make it smooth again...

    But Googling says I need "SHSH" files, which I don't have since I've never jailbroken it.

    However, some answers in these forums seem to indicate that it's still possible, but a lot of abbreviations are getting thrown around.

    Could someone please tell me the procedure without using abbreviations, so I know what to start reading about?

    Thank you! :)
  2. dhlizard macrumors G4


    Mar 16, 2009
    The Jailbreak Community
    Not for a 3G to 3.1.3 you don't
    Download the IPSW to desktop, get RecBoot on desktop
    Put the phone in DFU Mode
    Use iTunes to browse to IPSW
    Choose set up as new, iTunes won't allow you to restore to backup since you downgraded
    When you see an error at the end, use RecBoot to kick it out

    There are many tutorials on this, Google is your friend
  3. eobet thread starter macrumors member

    Aug 11, 2009
    Oh, thanks!

    That was easy. As you said, there's many tutorials on this on Google, and apparently I was looking at the wrong ones.

    I now have a fast iPhone again!

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