iPhone 4S can reportedly be unlocked without any hardware or software changes
Update: This only works until the TMSI is refreshed which means it won’t last very long
Michael Capozzi (via Chronic) has apparently discovered how to unlock the iPhone 4S (reportedly AT&T version only) without any software or hardware tweaking. The unlock will assist you in using your iPhone 4S on T-Mobile’s network as long as you have a T-Mobile SIM card. Before you get started, go ahead and cut down your T-Mobile SIM card to match your AT&T SIM card’s size. Go ahead and give the following directions a try:
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Insert original carrier AT&T SIM card
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Dial 611 for AT&T customer service hotline and drop the call
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Turn on Airplane Mode
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Take out AT&T SIM card
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Insert T-Mobile SIM card
Update: the unlock also works with the iPhone 3GS and iPhone 4, and will need to be done again if you reset your device. Continue after the break..
