i m in need of a new phone and im looking online at some real nice smartphones which are unlocked, like backberry and few touchscreen ones, i have a familytalk plan from at&t in which i can add a line for 9.99 a month, but thats only for a BASIC phone that i buy from them? my question is that if i buy a unlocked phone and add a line for 9.99 do i need a data plan for my unlocked phone or can i make calls with just that? and i will not use text or web on the phone either just calls