Ultrasn0w iOS Unlocking Tool Now Works With Version 4.2.1 (3G/3GS Only)

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Ultrasn0w, the iPhone Dev Team’s iOS unlocking tool, was broken recently by Apple’s “aggressive compiler optimization.” Whatever. It works again, sort of, but only for iPhone 3G and 3GS. The iPhone 4 uses a different baseband so that version will have to wait. [iPhone Dev Team via BGR]