Hi, I used my upgrade on a second line to get my girlfriend an Iphone 4. She is not on my line. I purchased today from the Apple Store, and they did not activate it in the store (gave to me still shrink wrapped in the box, but did obviously scan it out). How do I go about getting it activated on her line? Can she use the sim it comes with to activate on her line, since I didn't activate on my line yet, or does she need a new sim? How do I go about removing the Iphone 4 from my line so I don't have to pay the data plan? Anything else I should know?? All help is appreciated!! Edit: My gf has her own ATT line (was not yet eligible), and currently has a 3GS, which I will take and sell - so she will just be adding the Iphone 4 to replace her 3GS on her existing line.