My experience with AT&T is they've always given me a new SIM, when buying a new phone from them, but I've also bought raw sim's from them with no problem. I th

My experience with AT&T is they've always given me a new SIM, when buying a new phone from them, but I've also bought raw sim's from them with no problem. I think they just write the "New Phone" script for their employees, with a new sim, so the steps,are always the same. Less chances to mess things up when there are less choices.