As I mentioned last month, I took the plunge into Windows Phone 7 on the AT&T network. For me, this is the first smartphone I’ve owned on my personal cellular account. I’ve had two other smartphones in the past; a Samsung Windows Mobile device on Verizon about 8 years ago and an iPhone 3G on the AT&T network for the last two years; but I’ve never had to track my usage or pay for those, as they were provided by my employers at the time. With the iPhone, at least (I’m not sure about the Samsung device), the data plan was unlimited, so there was nothing to track.
However, with my new Windows Phone handset, I selected the lower-tier data plan on AT&T’s network (200 megabytes of data for $15/month).