"Please note: A data plan is required for the life of your iPhone service and cannot be removed in the future."
I am confused about data plans for the iphone and smart phones in general. When AT&T, for example, says they will charge $15/month for 200MB of data, does that mean 3G data? If I only wanted to use the phone for data thru my existing home wi-fi, could I just buy the AT&T voice plan and still have internet on the iphone thru the wi-fi? AT&T also brags about its wi-fi hotspots. Do I have to have the data plan to access those? And would that data then be limited to the 200MB in the plan I mentioned previously?