LeeNH
macrumors regular
Unfortunately, every one of you are wrong. Normally, you could just swap the SIM cards and be done with it. But since the new iPhone 5 has a nano SIM, you will need to take both phones into ATT and have them do the swap in their computers. OR call ATT from a line thats not involved in the swap and they can do it over the phone. But whatever you do, DO NOT ACTIVATE IT THROUGH ITUNES OR ON THE IPHONE FIRST! When talking to an ATT rep, mention "cross activation" and they should know what to do. This is a pretty common practice and there are many threads on this already.
Yes, I believe this is absolutely correct. I spoke with AT&T before the pre-sale to find out how to do a cross-upgrade as I'm doing.
AT&T said they will take care of everything in their computer as far as switching the new iPhone to my line (ordered under another line on my account).
DO NOT ACTIVATE your new phone if you plan on cross-upgrading.