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Thread: Can I upgrade to 4.0, unlock & JB?

  1. #1
    Default Can I upgrade to 4.0, unlock & JB?
    I have:
    3GS JB with Spirit
    Old bootrom
    3.13 (7E18)
    Model MC137LL
    I want to upgrade to 4.0, unlock & JB before my iPhone 4 arrives today. I've read that the new JB won't work with Spirit. Should I re-JB with Blackra1n first?

    Then I want to JB & unlock the new iPhone 4.

    Would anyone please layout the proper JB-unlock scenarios for both phones?

    Much appreciated.

  2. #2
    My iPhone is a Part of Me
    Join Date
    Apr 2010
    N. Ireland
    Thanked 81 Times in 75 Posts

    I too wondered this. I am on 3GS with old boot. JB with spirit on 313. Never JB on 312 so no SHSH saved. If I restore to stock 313 can I then JB with Pwnage Tool, no one seems entirely clear on this.

  3. #3
    same here hopefully there will be a guide up soon

  4. #4
    downgrade to 3.1.2 and use blackra1n (will need your shsh blobs on file)

    or restore to a custom 3.1.2

    Then restore to the custom 4.0 package

    iPhone 4 isn't even out yet... its impossible for there to be a guide already... just keep checking up on the front page, it'll be there before anything.
    The only thing I ask in return for helping, is that you click the thanks button, Thanks!

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