I'm looking to buy an unlocked Iphone5 on craigslist. The guy says we can meet at att store but I dont know if there is still risk doing this. I dont have att and have tmobile which is why I ask. I know that with Tmobile if you lose your phone and claim insurance on it or tell them you lost it, they will block the IMEI from the network. But that's only if you lost it. If I show up to the store and it works on the Att network, works on the Tmobile network, is there anything to fear? Can he go back and later report it stolen and take my money and get a new phone? Or can we call att and transfer ownership?