12 Copyright © 2004 Nokia4 About your phone• SWITCH ON YOUR PHONEWarning: Do not switch the phone on whenwireless phone use is prohibited or when it maycause interference or danger.1 To turn your phone on or off, press and hold the Powerkey on top of the phone for at least three seconds.If the phone displays Insert SIM card, even though theSIM card is properly inserted, or SIM card not supported,contact your service provider.2 If the phone asks for a personal identity number(PIN) code, enter the PIN code (displayed as ****) andselect OK.3 See the information about PIN codes on page 63, if applicable.4 If the phone asks for a security code, enter the security code and select OK.See “Change the security code” on page 65 for more information.If the language that appears in your display is not correct, see “Display language”on page 52 for information on changing the display language.Back cover On the back of your phone, you will findthe back cover release button. When youremove the back cover, you will find anantenna area, which is similar to theone shown in the graphic on the left.Back coverreleaseAntenna area