78Copyright © 2006 Nokia. All rights reserved.Select Menu > Settings > Security and one of the following options:PIN code request — to set the phone to ask for your PIN or UPIN code every time the phone is switched on.Some SIM cards do not allow the code request to be turned off.Call barring service — to restrict incoming calls to and outgoing calls from your phone (network service). Apassword is required.Fixed dialling — to restrict your outgoing calls to selected phone numbers, if this function is supported by yourSIM card.Closed user group — to specify a group of people whom you can call and who can call you (network service).Security level > Phone — the phone asks for the security code whenever a new SIM card is inserted into thephone. Select Memory and the phone asks for the security code when the SIM card’s memory is selected andyou want to change the memory in use.Access codes — to set the PIN code or UPIN code in use, or to change the security code, PIN code, UPIN code,PIN2 code, and call barring password.Code in use — to select whether the PIN code or UPIN code should be active.Authority certificates or User certificates — to view the list of the authority or user certificates downloadedinto your phone. See Certificates p. 109.Security module settings — to view Security module details, activate Module PIN request, or change the modulePIN and signing PIN. See also Access codes p. 13.■ Restore factory settingsTo reset some of the menu settings to their original values, select Menu > Settings > Restore settings and enterthe security code. Data that you have entered or downloaded is not deleted. For example, names and numbersin Contacts are not affected.