Your Nokia N7618Power saver LEDThe display is switched off to save battery power after thescreen saver is actived. A blue LED in the top of the coverdisplay blinks to indicate that the device is powered on, butin the sleep mode.To turn the sleep mode on or off, see ‘Cover display’, p. 101.Volume and loudspeaker controlTo increase or decrease the volume level when you have anactive call or are listening to a sound, press the volumekeys.The built-in loudspeaker allows you to speak and listenfrom a short distance without having to hold the device toyour ear.Warning: Do not hold the device near your ear whenthe loudspeaker is in use, because the volume may beextremely loud.To use the loudspeaker during a call, select Options >Activate loudspeaker.To turn off the loudspeaker, select Options > Activatehandset.Keypad lock (keyguard)To lock the keys with the fold closed, press , then. To unlock the keys, press , then .To lock the keys with the fold open, press , then .To unlock the keys, press , then .When the keypad lock is on, calls may be possible to theofficial emergency number programmed into your device.HeadsetYou can connect a compatibleheadset or compatible headphones tothe Nokia AV Connector (3.5 mm) ofyour device. You may need to selectthe cable mode.Do not connect products that createan output signal as this may causedamage to the device. Do not connectany voltage source to the Nokia AVConnector.When connecting any external device or any headset,other than those approved by Nokia for use with thisdevice, to the Nokia AV Connector, pay special attention tovolume levels.