I'm using 3G Watchdog to keep tabs on my data usage - I only have the 200 mb plan and don't want to move up unless I really have to. After using 3G Watchdog for a few weeks, I'm noticing that the amount of data used as reported by 3G Watchdog is far less than what AT&T reports - example, 3G Watchdog says I've used 39.87 MB since the start of my billing period, while AT&T says I've used 55.17 MB. I typicall use my home wi-fi, so I use very little 3G (exception yesterday when I was traveling). I also turn off 3G and wifi when I'm not using the phone. Anyone have any thoughts as to why the two would be so far off from one another? Should I be concerned that AT&T might be inflating my usage, or should I just accept it and assume 3G Watchdog is wrong? Thanks for your input!