Nokia 3100 and Nokia 3120 User Guide 29 Copyright © 2004 NokiaPhone security• ACCESS CODES• Security code—This code, supplied with the phone, protects your phone againstunauthorized use. The preset code is 12345. See “Security” on page 62 formore information.• PIN code—This code, supplied with the SIM card, protects the card againstunauthorized use. Set on the PIN code request in the Security settings menu(see “Security” on page 62 for more information), so that the code is requestedeach time the phone is switched on. If you enter an incorrect PIN code threetimes in succession, the SIM card is blocked. You must enter the PUK code tounblock the SIM card and set a new PIN code.• PIN2 code—This code is supplied with some SIM cards and is required to accesscertain services, such as charging unit counters. If you enter an incorrect PIN2code three times in succession, PIN2 code blocked appears in the display andyou will be asked for the PUK2 code.You can change the security code, PIN code and PIN2 code in Access codes inthe Security settings menu. See “Security” on page 62 for more information.Keep the new codes secret and in a safe place, separate from your phone.• PUK and PUK2 codes—These codes may be supplied with the SIM card. Formore information, contact your service provider.• Call restriction password (4 digits)—The restriction password is needed whenusing the Call restrictions. See “Security” on page 62 for more information.You can obtain the password from your service provider.• CLOSED USER GROUPSThis network service specifies the group of people whom you can call and who can callyou. Default resets the phone to use a user group that the SIM card owner has agreedupon with the service provider. When calls are limited to closed user groups, calls stillmay be possible to the official emergency number programmed into your phone.Turn on closed user groups1 Select Menu > Settings > Security settings > Closed user group > On.2 Enter the group number, then select OK.Turn off closed user groupsSelect Menu > Settings > Security settings > Closed user group > Off.