I am expecting to receive my new AT&T 64g iPad tomorrow. I am almost certain I am going to exchange it for the Verizon version after spending the past week weighing pros and plans of each carrier's data plans and reviewing LTE coverage/buildout in my sector of the country. Is it okay for me to open it when it arrives and try it out for a week or so and then make exchange at Apple store? Will there be a Verizon unit available for exchange or will I have to go through reorder or reservation process for replacement unit? Should I not open it at all? I am leaving town on Friday and wouldn't be able to exchange before Monday at the earliest.