Several functions are associated with On/Off:
Press On/Off to turn your device on or off.
Press On/Off to turn on the key lock.
2. The Volume key
Press the right or left part of the Volume key to adjust the volume.
Connect the charger or data cable to the device socket and to a wall socket or your computer's USB port.
4. Headset socket
Connect the headset to the headset socket.
5. 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.
6. 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.
7. HDMI socket
Connect a HDMI cable to the HDMI socket and to an external screen to view your pictures or video clips.