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 "Mobile Data"
Press Mobile Data.
2. View data usage
The total data usage is displayed below MOBILE DATA USAGE.
The data usage for each application is displayed below USE MOBILE DATA FOR.
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.