Got a quick question- Purchased an 8gb 3g iphone less than a week ago, and have now realized the 16gb will be better for me. My brother wants to just pay me what I paid for the phone, and I will then in turn go to get a 16gb from the apple store. Is there anything wrong with this situation? IE will i encounter any problems with getting another phone on the same account? Also, will I have to pay the full 399/499 price or will I only hae to pay the 299 again. Thanks!