1. Signal strength will be indicated in the Notifications bar. When you are within range of a cellular tower the indicator will show more bars. If you are not in range of a cellular tower you will have fewer bars/less signal strength.
   Note: To view the locations AT&T voice and data service can be used, see the AT&T Network coverage map.
   
2. If 4G LTE is available, the 4G LTE icon will display next to the signal strength indicator in the notifications bar.
   
3. If Airplane mode is enabled, the Airplane mode icon will display in the notifications bar.