So I'm looking at my AT&T data usage for the last month and I'm getting these huge(5-7MB) Internet Data Sent events when the phone was almost always on WiFi. I know I'm not sending huge email attachments, so what the **** could this be? A virus?
Remember that the Wi-Fi connection goes into standby mode when the phone isn't active, so anything you have pushing/pulling data on a schedule (email, etc.) will use your data connection during those periods. That is most likely what you are seeing.