You can connect the CMMB headset to theMicro USB connector.Change the volume of a call, song, orvideoUse the volume keys.You can adjust the volume during a call orwhen an application is active.The built-in loudspeaker allows you tospeak and listen from a short distancewithout having to hold the device to yourear.Activate or deactivate the loudspeakerduring a callSelect or .Lock or unlock the keys and screenTo avoid accidentally making a call whenyour device is in your pocket or bag, lockthe keys and screen of your device.Slide the key lock switch.Tip: If the key lock switch is out of reach,to unlock the device, press the menu key,and select Unlock.Set the keys and screen to lockautomatically1 Select Menu > Settings and Phone >Display > Screen/keylock time-out.2 Define the length of time after whichthe keys and screen are lockedautomatically.Insert or remove the SIM cardDo not attach any stickers to your SIM card.Important: Do not use a mini-UICC SIMcard, also known as a micro-SIM card, amicro-SIM card with an adapter, or a SIMcard that has a mini-UICC cutout (seefigure) in this device. A micro SIM card issmaller than the standard SIM card. Thisdevice does not support the use of micro-SIM cards and use of incompatible SIMcards may damage the card or the device,and may corrupt data stored on the card.8 Get started© 2011 Nokia. All rights reserved.