User Manual
Tools
104
connection. In this case, the message centre number and the recipient’s phone number
have to be included on the fixed dialling list.
Note: When security features that restrict calls are in use (such as call barring,
closed user group and fixed dialling) calls still may be possible to the official
emergency numbers programmed into your phone.
Closed user group (network service) - To specify a group of people to whom you can call
and who can call you.
Confirm SIM services (network service) - To set the phone to display confirmation
messages when you are using a SIM card service.
Certif. management
Digital certificates do not guarantee safety; they are used to verify the origins of software.
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.
Glossary: Digital
certificates are used to
verify the origin of the
XHTML or WML pages and
installed software.
However, they can only
be trusted if the origin of
the certificate is known
to be authentic.
Digital certificates should be used if you want to connect to an online bank or another site
or remote server for actions that involve transferring confidential information. They should
also be used if you want to reduce 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.
Viewing certificate details - checking authenticity
R0915_en.book Page 104 Wednesday, September 15, 2004 12:14 PM