So, my friend has an iPhone 4S locked to AT&T. He is willing to sell it to me for less than an Apple store would sell it to me "off contract". In need of a new phone, I see why not. I understand I could only use Edge speeds, but, hey, I hear it's not too bad. My question is... Since the iPhone 4S is already locked to AT&T (he's been using it for a week or so) is there any way I can unlock it? Also, I currently have a MyTouch 4G (isn't working too well--hardware issue). I use a regular T-Mobile SIM card for it. I know that the iPhone 4S only works with Mico-SIM cards. So, if I were to buy one for $10 from T-Mobile, could I easily transfer my contacts and such from my current SIM card to the Micro-SIM? Thanks!