My friend's T-Mobile agreement is up, he is going to be activating his iPhone next month on AT&T - or at least plans to. According to this article, old iPhones that have been replaced with new ones will not work on AT&T anymore: http://crave.cnet.com/8301-1_105-9717097-1.html This sounds like bunk to me - what if you sell your old iPhone off? If you put an AT&T SIM in it, and it is in "Connect to iTunes" mode, it should take you to the iTunes Activation page? But, with in store activation, is the iTunes iPhone Activation for older phones completely going away? How do people with old iPhones activate on AT&T? Go to the store?