I have a reservation that I will be picking up in about an hour or so. My question is that will I have to activate the phone using the included sim card? Or can I use the on in my current phone? Reason I ask is because I upgraded the line with an iPhone 5 but the line is my girlfriends line. Although it is in my name, she is happy with her 4S And doesn't need the upgrade. Yes I am aware of the nano sim. I will be trimming my micro sim to nano sim.