Fixed diallingSelect Menu > Communic. > Contacts > Options > SIMcontacts > Fixed dial contacts.With the fixed dialling service, you can restrict calls from yourdevice to certain phone numbers. Not all SIM cards supportthe fixed dialling service. Contact your service provider formore information.When fixed dialling is activated, calls may be possible to theofficial emergency number programmed into your device.1. To restrict calls from your device, select Options > NewSIM contact and enter the contact name and phonenumber to the list of numbers to which calls are allowed,or select Add from Contacts to copy the contact fromContacts. To restrict calls by a country prefix, enter thecountry prefix in the list of numbers. All phone numbersto which calls are allowed must start with this countryprefix.2. Select Options > Activate fixed dialling. You need yourPIN2 code to activate and deactivate fixed dialling or edityour fixed dialling contacts. Contact your service providerif you do not have the code. To cancel the service, selectOptions > Deactivate fixed dialling.Tip: To send text messages to the SIM contacts whilethe fixed dialling service is active, you need to add thetext message centre number to the fixed dialling list.Certificate managerSelect Menu > Tools > Settings > General > Security >Certificate management.Digital certificates are used to verify the origins of softwarebut do not guarantee safety. There are four different types ofcertificates: authority certificates, personal certificates,trusted site certificates, and device certificates. During asecure connection, a server may send a server certificate toyour device. Upon receipt, it is checked through an authoritycertificate stored in your device. You receive notification ifthe identity of the server is not authentic or if you do not havethe correct certificate in your device.You can download a certificate from a web site, or receive acertificate as a message. Certificates should be used whenyou connect to an online bank or a remote server to transferconfidential information. They should also be used if youwant to reduce the risk of viruses or other malicious software,and to check the authenticity of software when youdownload and install software to your device.Tip: When you add a new certificate, check itsauthenticity.View certificate detailsYou can only be sure of the correct identity of a server whenthe signature and the validity period of a server certificatehave been checked.Security and data management© 2008 Nokia. All rights reserved.114
