Several functions are associated with On/Off:

Tap and hold On/Off to turn your device on or off.

Briefly tap On/Off to turn on the key lock.

Several functions are associated with the Home key:

Tap the Home key to return to standby mode.

Tap the Home key twice to see a list of active applications.

Slide the Silent mode key up or down to turn display rotation or silent mode on of off.

Tap the upper or lower part of the Volume key to adjust the volume.

Connect the charger or data cable to the socket at the bottom of your device and to a power point or the computer's USB port.

Connect the headset to the headset socket at the top 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.

Point the camera lens at the front of your device at the required object during a video call.