I'm a current AT$T wireless customer. I have 4 lines on a family plan with NO iphones. We have no data plans on any of our phones. I work with a guy who's buying a new 3G S Iphone, and offered his 3G phone to me at a very good price. I'd like the iPhone, but don't want a data package. Can I put my SIM card from my regular AT$T cell phone into the iPhone, and activate it using my home WiFi and use it without a data package? As I understand AT$T will still know I'm using an IPhone. Would they add the data package to me automatically? What are my options to use this on the AT$T plan I already have and not have a data package? Thanks!