Several functions are associated with On/Off:

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

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

To reject an incoming call, tap On/Off twice.

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 right or left to turn silent mode on of off.

Tap the Top volume key or the Bottom volume key to adjust the volume.

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

Connect the headset to the headset socket at the top of your mobile phone.

Point the camera lens at the back of your mobile phone at the required object to take a picture or record a video clip.

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