I had the 3GS iPhone previously and uesd maybe 50 mb /month. I switched from unlimited to 200mb due to my low usage. I am a week and a half in my billing cycle and AT&T let me know that I used up 200mb of data and am being charged $15 for an addition 200mb. This seemed strange to me due to my past data usage so I looked at my usage online and there are seriously weird things. Sometimes at 3am or like 10am, it shows I have 80mb used. Now this is weird since I'm either at home sleeping or at work and both places have wireless so it shouldn't be using 3G or anything. I called AT&T and after spending an hour on hold because they had no idea what was going on, they said they logged a support ticket and I will get a call back within a week so they can do proper research. I have another iPhone 4 on my account and that phone shows appropriate data usage although sometimes at really weird times too when wireless should be enabled. Anyone know what's going on??