Hey there, I have a family member that is at an ATT store about to purchase a new individual plan that currently has an HTC ARIA phone. She does not want to purchase a new phone and wants to continue using her HTC. She is allowing me to use her new customer pricing on the White Iphone 4. My questions is, since she will be handing over the Iphone to me. How do I keep her in the requirements needed to get the discount with her new plan, while she's still using her HTC? I know the Iphone 4 has the micro sim, not sure on the HTC. Thanks and hopefully I made sense on what I'm asking.