Upgrading from 2.2 to 3.1.2..

Discussion in 'Jailbreaks and iOS Hacks' started by lukeman3000, Jan 28, 2010.

  1. lukeman3000 macrumors regular

    Nov 20, 2007
    I am currently running a jailbroken iphone 3G on firmware version 2.2 (5G77). The modem firmware is 02.28.00. It is not unlocked, but I believe I have the correct baseband for that capability (I think).

    I have been running 2.2 for a long time and I really think it's time to upgrade due to increased app support on 3.1.2. I am wondering, what steps to I need to take to do this if my phone is already jailbroken? What things need to be taken into consideration when upgrading from firmware version 2.2 to 3.1.2 on an already jailbroken 3G?

    I have been out of the scene for a long time, and it would really help if someone with the knowledge could sum it up for me. I don't want to make a mistake during the process because there was some minute detail I didn't know about..
  2. daveb1983 macrumors newbie

    Jan 28, 2010
    You have quite a few options here depending on what computer you have (Mac Vs Windows) whether you run a legit SIM and whether you actually want an unlocked phone or just a jailbroken one?
    First things first though (and it will be a real pain) is that like apple apps, some, if not all, of the jailbroken apps/tweaks you have now will not work on 3.1.2 if you are now on 2.x. However most of the ones you have will have updated versions that will be a lot better. This makes backing up your jailboken apps with say PKGbackup pretty useless so i would suggest sync you iphone with itunes, restore and update the FW to 3.1.2 and then jailbreak with blacra1n RC3 (sn0wbreexe, redsnow 0.9 and restoring to a custon jailbroken FW are alternatives but this is the recommended tool and i have never had trouble with it) and then start again with a freshly jailbroken phone and aquire all the apps you want, it may take a while but it will be worth it.
    if you want an unlock, then cydia offers packages to do this no matter what your baseband is.
    If it is the process of how to restore and update you need, i'll be happy to help, just let me know.
    Hope this helps
  3. lukeman3000 thread starter macrumors regular

    Nov 20, 2007
    Thanks man, that helps a lot. I don't really care about a lot of the apps I have right now, and I can just re-download the newest versions of the ones that I want after I update, like you said. My 3G is running the stock sim card that came with it, and although it's jailbroken, I've never actually unlocked it or needed to.

    Also, do you have to unlock the 3G to use another AT&T sim card in it, or does that work by default on a non-unlocked 3G?
  4. FastangV6 macrumors regular


    Oct 1, 2007
    Any AT&T SIM should work. No need to unlock.

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