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Discuss Help 3gs 4.0 to 4.21 at the iOS 4.x (iPhone OS 4.x) - Hackint0sh.org; I have a 3gs jailbroken with Jailbreakme unlocked with Ultrasn0w. I would like to upgrade ...
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    Default Help 3gs 4.0 to 4.21

    I have a 3gs jailbroken with Jailbreakme unlocked with Ultrasn0w.

    I would like to upgrade to 4.12 and not lose the jailbreak. I have firmware blobs backed up with tiny umbrella. baseband is 05.13.04

    Can anyone give me the best procedure to upgrade and preserve the unlock?

    Thanks in advance



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    yes not to upgrade to 4.2.1 since there isnt unlock solution yet...
    please refer to Dev Team blog page for more details

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    Quote Originally Posted by TDMaster View Post
    yes not to upgrade to 4.2.1 since there isnt unlock solution yet...
    please refer to Dev Team blog page for more details
    This is correct, the only supported upgrade you can perform is to use Pwnagetool 4.1.2 to safely go to iOS 4.1 and retain unlock.

    Also make sure you have 4.1 SHSH (and if possible 4.2b3) SHSH backed up with TinyUmbrella - these will be important to an untethered jailbreak on 4.2.1 (if you have a new bootrom 3GS)
    Please read the stickies & search forum before posting!
    How to report an iTunes restore/update fail in a useful manner
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