Nokia 3250 User Manual

Also see for 3250 - XpressMusic Cell Phone 10 MB: Specification sheet User guide User guide Service manual Service manual

Contents

Nokia 3250 User Manual Manual pdf 102 page image

102Copyright © 2006 Nokia. All rights reserved.Autolock period — to set a time-out after which the phone is automatically locked. To use the phone again, youneed to enter the correct lock code. To turn off the autolock period, select None.Lock if SIM changed — to set the phone to prompt for the lock code when an unknown, new SIM card isinserted into your phone. The phone keeps a list of SIM cards that are recognized as the owner cards.Closed user group (network service) — to specify a group of people whom you can call and who can call you. Formore information, contact your network operator or service provider. To activate the default group agreed onwith the network operator, select Default. If you want to use another group (you need to know the group indexnumber), select On.When security features that restrict calls are in use (such as call barring, closed user group, and fixed dialing) calls may bepossible to the official emergency number programmed into your device.Confirm SIM services (network service) — to set the phone to display confirmation messages when you use aSIM card serviceCertificate managementDigital certificates do not guarantee safety: they are used to verify the origins of software.To view a list of authority certificates that have been stored in your phone, select Menu > Tools > Settings >Security > Certif. management. To see a list of personal certificates if available, scroll right.Digital certificates should be used if you want to connect to an online bank or another site or remote server foractions that involve transferring confidential information. They should also be used if you want to reduce therisk of viruses or other malicious software and be sure of the authenticity of software when downloading andinstalling software.Important: Even if the use of certificates makes the risks involved in remote connections and software installationconsiderably smaller, they must be used correctly in order to benefit from increased security. The existence of acertificate does not offer any protection by itself; the certificate manager must contain correct, authentic, ortrusted certificates for increased security to be available. Certificates have a restricted lifetime. If Expiredcertificate or Certificate not valid yet is shown even if the certificate should be valid, check that the current dateand time in your device are correct.