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Nokia 6600 User Guide 73 Copyright © 2004 Nokia
Tools
• To add new numbers to the Fixed dialling list, select Options→ New contact
or Add from Contacts.
Closed user group (network service) - You can specify a group of people to whom
you can call and who can call you. For more information, contact your network
operator or service provider. Select: Default to activate the default group agreed
on with the network operator, On if you want to use another group (you need to
know the group index number), or Off.
Note: When calls are limited to Closed User Groups, calls may be possible
to certain emergency numbers in some networks (e.g. 911 or other official
emergency number).
Confirm SIM services (network service) - To set the phone to display confirmation
messages when you are using a SIM card service.
Delete server - To reset your connection settings allowing you to receive new
settings from your service provider.
CERTIF. MANAGEMENT
In the Certificate management main view, you can see a list of authority certificates
that have been stored in your phone. Press to see a list of personal certificates,
if available.
Authority certificates are used by some browser services, such as banking services,
for checking signatures or server certificates or other authority certificates.
Digital certificates are used to verify the origin of browser pages and installed
software. However, they can only be trusted if the origin of the certificate is known
to be authentic.
Options in the certificate management main view: Certificate details,
Delete, Trust settings, Mark/Unmark, Help, and Exit.
Digital certificates may be needed when you, for example:
• want to connect to an online bank or another site or remote server for actions
that involve transferring confidential information, or
• want to decrease the risk of viruses or other malicious software and be sure of
the authenticity of software when downloading and installing software.
Important: Even if the use of certificates makes the risks involved in
remote connections and software installation considerably smaller, they
must be used correctly in order to benefit from increased security. The
existence of a certificate does not offer any protection by itself; the
certificate manager must contain correct, authentic, or trusted certificates
for increased security to be available.
Certificates have a restricted lifetime. If Expired certificate or Certificate
not valid yet is shown even if the certificate should be valid, check that the
current date and time in your phone are correct.