3GS 3.1 able to upgrade to ios 4.0 and jailbreak?

Discussion in 'Jailbreaks and iOS Hacks' started by needuhelp, Jul 17, 2010.

  1. needuhelp macrumors newbie

    Joined:
    Jul 17, 2010
    #1
    I have a 3gs on 3.1 ob, can i upgrade to 4.0 and jailbreak? Thanks

    If yes, should i upgrade to 3.1.2 first then 4.0 or i can just upgrade to 4.0 directly?
     
  2. dhlizard macrumors G4

    dhlizard

    Joined:
    Mar 16, 2009
    Location:
    The Jailbreak Community
    #2
    Jailbreak the phone on 3.1 (if not already) then if you have old bootrom, Use Pwnage Tool to make a custom restore 4.0 (not 4.0.1) IPSW, use iTunes 9.2 to install it.
     
  3. thelatinist macrumors 603

    thelatinist

    Joined:
    Aug 15, 2009
    Location:
    Connecticut, USA
    #3
    As dhlizard said, be sure not to upgrade to the official 4.0 firmware file. Only upgrade to a custom (pre-jailbroken) one.
     
  4. needuhelp thread starter macrumors newbie

    Joined:
    Jul 17, 2010

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