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  1. 11-30-2010, 04:06 PM #1
    Arceus498
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    Exclamation BB 5.12.01 3.1.3 JB'ed

    How do I update iPhone 3GS to 4.1 without losing My Baseband/Modem Firmware(5.12.01), and if Possible without restore. I have TinyUmbrella with SHSH's for 3.1.3,4.0,4.0.1,4.0.2,4.1,4.2b3,4.2.1

    Also is it Old or New Bootrom? It was Recived on June 18,2009.


    ???
    Last edited by Arceus498; 11-30-2010 at 04:06 PM. Reason: Automerged Doublepost
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  2. 11-30-2010, 04:08 PM #2
    Simon
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    Use idetector to determine what bootrom you have. To preserve baseband you will need to use pwnage tool or sn0wbreeze to make a custom firmware and restore to that.
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    Arceus498 (11-30-2010)
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