1. From the Home screen, swipe to, then tap the AT&T folder.
   
2. Tap Usage manager.
   
3. Data usage information for the selected billing cycle will be displayed.
   
4. To changed the displayed billing cycle, tap Data usage cycle.
   
5. Tap the desired billing cycle.
   
6. To changed the monthly billing cycle start date, tap Reset data usage.
   
7. Scroll to the desired date.
   
8. Tap OK.
   
9. To set a monthly data limit, scroll to, then tap Limit mobile data usage.
   Note: When the mobile data limit is active and has been reached, the mobile data block will remain in effect until mobile data is manually re-enabled on the device, the limit threshold is changed to a higher value, or a new data usage cycle begins. If you set data usage limits on your device, they do not communicate with AT&T systems. You will still receive AT&T system generated notifications as you approach your data limits.
   
10. Tap OK.
    
11. Drag the ALERT marker up or down to set the level at which you will be warned about your monthly data usage.
    
12. Drag the LIMIT marker up or down to set the monthly data limit.
    
13. The data warning and data limit will save automatically.
    
14. Scroll down to view data usage broken down by app.