I was looking at the detail of my data usage today and most of the data usage from my iphone was fairly small each time. The largest was about 700kb. Then the three times I tethered stick out like a sore thumb. One was 6,000kb, one was 7,800kb, and the other was about 10,000kb. They aren't huge because I didn't keep the phone tethered for very long but it looks like they're big enough to look odd when compared with the rest of the usage. Does AT&T look at usage this closely or do they just pay attention to the total and not look at the detail?