This morning I got pinged with the dreaded AT&T "you have exceeded 3GB text." I do have an unlimited plan, which I use mainly for web browsing. So I decided to track my data usage for the rest of the day and got some interesting results. When I got home I put my phone on Wi-Fi, and reset my cellular statistics. So 5 hours later my phone says it used: Sent = 3.1MB, Received = 11.5MB How is it using Cellular data when I'm on Wi-Fi?