JB/Unlock Iphone 3g 3.1.2 +Upgrading firmware

Discussion in 'Jailbreaks and iOS Hacks' started by MBR12, Apr 14, 2011.

  1. MBR12 macrumors newbie

    Joined:
    Jul 26, 2010
    #1
    I have an iphone 3g 3.1.2 that I need to jb and unlock, however I would like to upgrade while preserving my 5.11.07 baseband. I've seen a million tutorials, but I'm confused...do I upload a custom ipsw first?

    Thanks!
     
  2. eastercat macrumors 68040

    eastercat

    Joined:
    Mar 3, 2008
    Location:
    PDX
    #2
    Yes you use a custom ipsw.
    Press <option> and restore in iTunes to pick the file.
     

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