1. From the home screen, swipe to then tap AT&T.
   Note: To check your current month's data usage dial *data# (*3282#) on your mobile phone to receive a text message with the current bill cycle's usage.
   
2. Tap Usage Manager.
   
3. Tap Data Usage.
   
4. Scroll down to view the data usage summary for the selected Billing cycle.
   
5. Scroll to, then tap the Data usage cycle field to view data usage for a different billing cycle.
   
6. Tap the desired billing cycle to view data usage.
   
7. Tap Change cycle... to change the billing cycle start and end dates.
   
8. Scroll to select the first day of each billing cycle.
   
9. Tap Set.
   
10. A summary of the newly selected billing cycle will be displayed.
    
11. Scroll to, then tap Set mobile data limit to set a monthly data limit.
    
12. Tap OK.
    
13. Drag the Warning marker up or down to set the level at which you will be warned about your data usage.
    
14. Drag the Data limit marker up or down to set the data usage limit.
    
15. The Data warning and Data limit will save automatically.
    
16. Scroll down to view data usage broken down by App.