Basically I wish to get an iphone 3g, unlock or jail break it - whatever is needed, insert my AT&T sim card which I already have into it, and have it work. I don't have a data plan and don't currently have the $ to pay for one, so until then I plan on using wifi. I've found some apps to keep edge and 3g turned off by the way on my iphone, but my question is will AT&T realize my phone is an iphone and automatically add a data plan? Basically will this all work?