Read help info
You can see how much mobile data you've used when you use the browser or send and receive email messages etc.
1. Find "Data usage"
Press Connection & sharing.
Press Data usage.
2. View data usage
Press the drop down list.
Press the required setting.
The total data usage for the selected period is displayed.
The data usage for each application is displayed below the name of the application.
See how to turn mobile data on or off.
3. Return to the home screen
Press the Home key to return to the home screen.