G e t t i n g s t a r t e dCopyright © 2004 Nokia. All rights reserved. 7■ Switching the phone onand offPress and hold thepower key .Note that if thephone displaysInsert SIM card eventhough the SIM cardis properly inserted, or SIM card notsupported, contact your networkoperator or service provider. Yourphone does not support 5 Volt SIMcards and the card may need to bechanged.• If the phone asks for a PIN code,key in the PIN code (displayed as****), and press OK.See also PIN code request in”Security settings” on page 43and ”Access codes” on page xii.• If the phone asks for a securitycode, key in the security code(displayed as *****), and press OK.See also ”Access codes” on pagexii.Warning: Do not switch thephone on when wirelessphone use is prohibited orwhen it may causeinterference or danger.TIPS ONEFFICIENTOPERATION: Yourphone has abuilt-in antenna.As with any otherradio transmitting device, do nottouch the antenna unnecessarilywhen the phone is switched on.Contact with the antenna affectscall quality and may cause the phoneto operate at a higher power levelthan otherwise needed. Nottouching the antenna area during aphone call optimises the antennaperformance and the talktime ofyour phone.■ Keypad lock (Keyguard)You can lock the keypad to preventthe keys being accidentally pressed,for example, when your phone is inyour handbag.• Locking the keypadIn standby mode, press Menuand then within 1.5seconds.