I've preordered the new 3GS iPhone and am patiently( ) waiting along with everyone else. I've long been an AT&T wireless customer and my 1st gen phone has never been hacked or jailbroken in any way. I have a couple of questions regarding the switchover: 1) Will the new phone come with a new SIM card, or will I just swap out the card from old 1st gen iPhone? 2) If some catastrophe were to befall my new iPhone, but the SIM card was undamaged, would I be able to pop the SIM card into my old phone and immediately have phone service? 3) If the answer to question number 2 is a yes, then is there any reason I couldn't swap the SIM card between the phones at will, as often as I wish?