Wirelessly posted (8830: BlackBerry8830/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/105)
Well if your like a avg user as per day xxx amt of time on same sites, I believe most carriers off a way to check current estimate data usage. Just to be careful, check up on your bill for usage maybe weekly so you get an idea about how much you use. Anyway I hope this help and welcome
Kinda find it weird a bb don't track data usage but does voice calls.