Copyright © 2002 Nokia. All rights reserved. 22TIPS ON EFFICIENT OPERATION: Your phone has a built-inantenna. As with any other radio transmitting device, do nottouch the antenna unnecessarily when the phone is switchedon. Contact with the antenna affects call quality and may causethe phone to operate at a higher power level than otherwiseneeded. Not touching the antenna area during a phone calloptimises the antenna performance and the talktime of yourphone.■ Keypad lock (Keyguard)You can lock the keypad to prevent the keys being accidentally pressed, forexample, when your phone is in your bag.• Locking the keypadIn standby mode, press Menu and then within1.5 seconds to lock the keypad.When the keypad is locked, appears at the topof the display.• Unlocking the keypadPress Unlock and then within 1.5 seconds tounlock the keypad.• When keyguard is onTo answer a call, press . During a call, the phone can be operated normally.When you end or reject a call, the keypad will automatically lock.