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Thread: Need help unlocking iPhone 3GS 5.0.1 BB 6.15.00 oldbootrom

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Need help unlocking iPhone 3GS 5.0.1 BB 6.15.00 oldbootrom . I also have T-mobile carrier. I think I need to downgrade the BB to 5.13.04, and then downgrade the firmware
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    Default Need help unlocking iPhone 3GS 5.0.1 BB 6.15.00 oldbootrom
    Need help unlocking iPhone 3GS 5.0.1 BB 6.15.00 oldbootrom . I also have T-mobile carrier.

    I think I need to downgrade the BB to 5.13.04, and then downgrade the firmware to 4.3.3 to get the old SHSH.
    Is this correct? and then upgrade preserve the old BB by creating custom IPSW with redsn0w.

    I've spent over 6 hours trying to unlock my iPhone3GS, I got it as 5.0.1 BB 5.13.04. Updated to Ipad BB, and also downgraded and tried to unlock with ultrasn0w, restored it as fresh 5.0.1, and even used sn0wbreeze. All no good .

    Please help.
    Last edited by dxn817; 10-21-2012 at 08:41 AM.

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