Basic Operations25Turning Handset On/OffTo turn the handset on:Do one of the following:- Press . The LCD screen lights up.- Place the handset in the charger cradle.The handset can also be turned on automatically when inserting the batteries to the handset.To turn the handset off:1. Long press when the handset is idle.Adjusting VolumeYou can adjust the handset volume according to the noise level of the surrounding environment.The handset supports 5 different volume levels. The default level is 3.To adjust the volume when the phone is during a call:1. Press to decrease the ringer volume, or press to increase the ringer volume.The ringer volume can be adjusted using the menu or the predefined shortcuts (left and rightnavigation keys) on the keypad when the handset is idle.To adjust ringer volume via the handset:1. Press to enter the main menu.2. Select Settings->Audio->Ring Tones->Volume.3. Press to decrease the ringer volume, or press to increase the ringer volume.4. Press the Save soft key to accept the change or the Back soft key to cancel.You can also press or to adjust the ringer volume when the handset is idle or ringing.NoteLocking/Unlocking KeypadYou can lock the handset keypad to prevent all keys from being accidentally pressed.To lock the keypad via the handset:1. Long press when the handset is idle until the LCD screen prompts “Keypad Locked,Press and hold ‘#’ to unlock!”.If the ringer volume is adjusted to the minimum, the icon will appear on the status bar, andthe silent mode will be activated. For more information, refer to Switching Silent Mode to On/Offon page 26.