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unlock 3gs

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    How to find OS firmware version of an unactivated 3GS?

    Hi all, I've fished out my old 3GS iphone (without sim) that I'd like to unlock and give to my dad to replace his Nokia 3310 :) I've reset the phone to factory defaults, via the phone itself. However, in order to unlock it, how do I know which iOS version it's running? I believe when I last...
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