I'm going to switch from my old iPhone to the new 3g iPhone. What happens in a few months when Apple releases an upgraded firmware/software version iPhone 2.1 and i want to update my OLD phone. After syncing with my computer and applying the update, my old phone is going to try and activate via AT&T. If it doesn't find AT&T, doesn't it lock down and become un-usable?
How do we get around this?