If I put in my preorder on the AT&T premier site and get my phone # ported, when does the porting actually happen? I obviously cannot go without my phone for the week and a half between the preorder and receiving the phone. So does anyone know when my current phone (T-mobile) will stop working? Will it be after I activate through iTunes or whatever? Would it be better to wait and port the number after I actually have the phone? If I do this how long does the porting take? Thanks for any help!