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.
   
2. If 4G LTE is available, the 4G LTE symbol will appear next to the signal strength indicator in the Notifications bar.
   
3. If connected to Wi-Fi, the Wi-Fi Connected icon will be displayed in the notifications bar.
   
4. If the Signal Strength icon is replaced by an Airplane icon, Airplane mode is turned on and the device will not receive wireless signals.