Hi guys, So I did a search (albeit cursory) on this but didn't find the info I needed so here goes: I just bought a refurb iPhone (8gb) from the AT&T store (Natick) and am trying to get it set up to use on T-Mobile. When I bought the phone the guy was like oh yeah it's for new activations only so that's why we haven't sold out...and I thought you have to register/activate through iTunes before you can jailbreak it to use w/ another carrier but from what I am reading this isn't true. So here's my question - my iPhone didn't come with a SIM, and when I bought the phone I signed nothing - all he did was take my SSN, name and employer and gave me a credit approval and then sold me the phone for 249. Am I obligated in any way - i.e. do I need to call and cancel a contract or anything or have I not signed up for anything at this point? And second, once I use ziPhone to unlock (or any prog you all recommend) do I need to do anything else in order to a) use my T-Mo SIM and b) avoid being beholden to AT&T in any way? Thanks in advance!