Ok so here's the deal. I'm still on a family plan with my parents and I got an iPhone 4 back in July 2010. My mom has had the same dumb phone for the past 5 years and has no intention of getting a new phone any time soon. I want to preorder the 4S using her phone number and have it shipped to my house. I know though if I get the phone and activate it in iTunes my moms dumb phone will no longer work. Does anyone how I can activate it with my number? Will I have to take it to an AT&T store? Also I will have to add a data plan to my moms line to order the phone, will I be able to take the data plan off if the iPhone never gets activated on her line? Thanks.