I purchased my white iPhone 16g on 9/29. I am like most others and stuck in the 14-21 day timeframe for shipping. However just now I saw on the Apple site that my local store has them in stock right now. When I ordered mine through AT&T I had to add a line since my current 2 lines are not up for upgrade. Can I get my phone through apple store and still make this all work with my new line? Can I cancel the AT&T order? How does this work?