If I am bringing my Smart Phone to AT&T and I want to order online.
Can I just select my plan, a "free phone" and then check out. Oh, and add my $30 data plan. Would I still be able to use my current phone? Just put the sim in my current phone when they send the sim. Will that work?
Honestly, if you're bringing your own smartphone to AT&T, it's probably better to go into an AT&T store. You can get a plan without having to sign up for a contract, leaving your upgrade eligibility intact in case AT&T releases a phone you have to have (rather than signing up for a throw-away phone you won't use).