Nokia E75 Nokia E75 User Guide in English and in Spanish - Page 136

Security and data management Fixed dialing Select Menu > Contacts and Options > SIM contacts > Fixed dial contacts. With the fixed dialing service, you can restrict calls from your device to certain phone numbers. Not all SIM cards support the fixed dialing service. For more information, contact your service provider. When fixed dialing is activated, calls may be possible to the official emergency number programmed into your device. 1. To restrict calls from your device, select Options > New SIM contact, and enter the contact name and phone number to the list of numbers to which calls are allowed, or select Add from Contacts to copy the contact from the contacts list. To restrict calls by a country prefix, enter the country prefix in the list of numbers. All phone numbers to which calls are allowed must start with this country prefix. 2. Select Options > Activate fixed dialing. You need your PIN2 code to activate and deactivate fixed dialing or edit your fixed dialing contacts. If you do not have the code, contact your service provider. To cancel the service, select Options > Deactivate fixed dialing. Tip: To send text messages to the SIM contacts while the fixed dialing service is active, you need to add the text message center number to the fixed dialing list. Certificate manager Select Menu > Control panel > Settings and General > Security > Certificate management. Digital certificates are used to verify the origins of software but do not guarantee safety. There are four different types of certificates: authority certificates, personal certificates, trusted site certificates and device certificates. During a secure connection, a server may send a server certificate to your device. Upon receipt, it is checked through an authority certificate stored in your device. You receive notification if the identity of the server is not authentic or if you do not have the correct certificate in your device. You can download a certificate from a web site, or receive a certificate as a message. Certificates should be used when you connect to an online bank or a remote server to transfer confidential information. They should also be used if you want to reduce the risk of viruses or other malicious software, and to check the authenticity of software when you download and install software to your device. Tip: When you add a new certificate, check its authenticity. View certificate details You can only be sure of the correct identity of a server when the signature and the validity period of a server certificate have been checked. 136 © 2008 Nokia. All rights reserved.