On/Off
Several functions are associated with On/Off:
Press and hold On/Off to turn your device on or off.
Briefly press On/Off to turn the key lock on or off.
The Volume key
Press the upper or lower part of the Volume key to adjust the volume.
Socket
Connect the charger or data cable to the device socket and to a wall socket or your computer's USB port.
Headset socket
Connect the headset to the headset socket.
Camera lens at the back of your device
Point the camera lens at the back of your device at the required object to take a picture or record a video clip.
Camera lens at the front of your device
Point the camera lens at the front of your device at the required object to take a picture or record a video clip.