Bought used phone, how to restore to 3.0?

Discussion in 'Jailbreaks and iOS Hacks' started by applesucksbad, Oct 8, 2010.

  1. applesucksbad macrumors newbie

    Oct 8, 2010
    Hey guys, first post, first iPhone!

    I just bought a phone from craigslist from a guy. It has 3.0 on it right now. I need to unlock it to use with an AT&T sim with no data. How far should I upgrade the firmware (if any?). What firmware allows the highest flexibility? I'd like to restore it at least as it still have a bunch of his stuff on it.

    I tried upgrading to 3.1.3, but apparently it's unsigned by apple now, I can't find any clear guide on how to do it.

    Also, the phone is jailbroken, but cydia quits on startup. Thanks!
  2. Myzhi macrumors 6502a


    Dec 15, 2009
    Since phone is already pwned JB:

    1) Create (pwnagetool) or find (google) a custom already JB firmware file (one that keeps the baseband) you wish upgrade to. Restore with that file through iTunes.

    2) On the phone, use Cydia to install Ultrasnow = unlock.

    And, ATT will automatically add a data plan once they see it's an iPhone due to the phone's IMEI . Unlocking doesn't stop them from seeing the IMEI, but it does allow you to use Tmobile without data plan.
  3. applesucksbad thread starter macrumors newbie

    Oct 8, 2010
    Wow, thanks for the tip, in all the time I was researching how to use an iPhone with no data, no one pointed this out to me. Thanks for the warning. Time to ebay the phone I guess.

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