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Thread: JB iphone 3gs that was upgraded to iOS4.0

  1. #1
    Default JB iphone 3gs that was upgraded to iOS4.0
    Friend of mine JB his iPhone 3gs 3.1.3 using spirit..he has had no problems. He wants to upgrade his JB iPhone 3gs/3.1.3 to 4.0and JB it. Is this possible or will he need to buy an iPhone 4.0? Appreciate the responses.

  2. #2
    Tell your friend to read this first.

  3. #3
    Livin the iPhone Life
    Join Date
    Oct 2007
    Thanked 116 Times in 113 Posts

    He can update his phone to 4.0 but since he is on firmware 3.1.3 and jailbroken with Spirit he can not go directly to jailbroken 4.0. If your iPhone 3GS has the new bootrom you can not currently jailbreak 4.0. You can figure out what bootrom you have by running f0recast, if it says Tethered Yes then you can not currently jailbreak 4.0.

    You need to be on 3.1.2 firmware and jailbroken. If you need to downgrade back down to 3.1.2 make sure you have you SHSHs on file in Cydia for 3.1.2. Afterwords simply run blackra1n, edit your hosts file back to normal, and you'll be ready to jailbreak 4.0

    EDIT: or what douflag said.
    Have they released the jailbreak in the app store yet?

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