SecurityFixed dialingSelect > Contacts > Options > SIM contacts >Fixed dial contacts.With the fixed dialing service, you can restrict calls fromyour device to certain phone numbers. Not all SIM cardssupport the fixed dialing service. Contact your serviceprovider for more information.When fixed dialing is activated, calls may be possible tothe official emergency number programmed into yourdevice.1. To restrict calls from your device, select Options >New SIM contact and enter the contact name andphone number to the list of numbers to which callsare allowed, or select Add from Contacts to copy thecontact from Contacts. To restrict calls by a countryprefix, enter the country prefix in the list ofnumbers. All phone numbers to which calls areallowed must start with this country prefix.2. Select Options > Activate fixed dialing. You needyour PIN2 code to activate and deactivate fixeddialing or edit your fixed dialing contacts. Contactyour service provider if you do not have the code.To cancel the service, select Options > Deactivatefixed dialing.Tip: To send text messages to the SIM contactswhile the fixed dialing service is active, youneed to add the text message center numberto the fixed dialing list.Certificate managerImportant: Even if the use of certificates makesthe risks involved in remote connections and softwareinstallation considerably smaller, they must be usedcorrectly in order to benefit from increased security. Theexistence of a certificate does not offer any protectionby itself; the certificate manager must contain correct,authentic, or trusted certificates for increased securityto be available. Certificates have a restricted lifetime. If"Expired certificate" or "Certificate not valid yet" isshown even if the certificate should be valid, check thatthe current date and time in your device are correct.Before changing any certificate settings, you mustmake sure that you really trust the owner of thecertificate and that the certificate really belongs to thelisted owner.Select > Tools > Settings > General > Security >Certificate management.Digital certificates are used to verify the origins ofsoftware but do not guarantee safety. There are threedifferent types of certificates: authority certificates,personal certificates, and server certificates. During asecure connection, a server may send a server 93 Securityfile:///C:/USERS/MODEServer/lkatajis/11051417/ra-6_maxi/en/issue_1/ra-6_maxi_en_1.xml Page 93 Jan 8, 2007 1:39:30 PM