My Air is currently on my AT&T Mobile Share plan. I'm assuming that I can just take the SIM out of the Air and put it into the Air 2 and be good to go? I ask because when I look at my AT&T account online it specifically shows the SIM registered to an A1475 iPad Air, and obviously the Air 2 is a different device/model # - didn't know if it would cause issues or not. I'm hoping to not have to deal with an AT&T store or CS, because we all know how THAT is. I'm planning on keeping the Apple SIM, obviously, in case I ever decide to switch carriers or need it for international travel.