From the home screen, tap the AT&T AllAccess widget.
The data usage will display.
To set a data limit, touch and drag the Data limit slider to the desired adjustment. 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.
To view the bill cycle, tap View Current Bill.
To view app usage, from the home screen, swipe down from the top of the screen to access the Notification menu.