At the moment, all of the AT&T stores around me are sold out of iPhone 3Gs. But soon, I will be traveling to an Apple Store, which is in stock. But there are some questions I need answered about using an Apple Store that is, while in the same state, far from my home. 1. Being that store is out of area, will I be able to set up the phone using my current number? 2. I am not upgrade eligible and I am using an upgrade from someone else on my family plan. Will they have the information to set up the phone without doing anything my line or the other person's line?