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 Airplane mode is enabled the Airplane mode icon will be displayed in the Notifications bar.
   
4. When connected to a Wi-Fi network, the Wi-Fi active icon will be displayed in the Notifications bar. The numbers of signal bars corresponds to the strength of the Wi-Fi signal.