Read help info
You can see how much data has been transferred using your phone's data connections such as when you use the browser or when you send and receive email messages. Follow these instructions to view data usage.
Find "GPRS counter"
Press the menu icon.
Press Network settings.
Press GPRS counter.
Press one of the following options:
The data usage for the selected view is displayed below the menu item.
Press Disconnect to return to standby mode.