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

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]