The following is an example of an item showing on my ATT data usage:

02/13 02:41 AM blackberry.net Internet/MEdia Net Sent 145KB

I'm at a loss to know what it is. Similar entries shows a few times a day. In each case I'm sure I was not using the phone. This one in particular as I had not used the phone for about 5 hours and did not for about 6 hours after.

8310 on ATT and BIS

Searched and searched and found nothing. ATT customer service no help.

Wirelessly posted (8320 Curve: BlackBerry8320/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)

The berry will just randomlly sent/recieve data. Its mostly for sync purposes.

that doesn't sound right, i never get those random emails

It never happened until I activated a blackberry.net email address. There are never any "receives", just sents. Many are in the 2 to 3 am time frame. Size varies from 2 to 100+KB's.