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Closed user group — You can specify a group of people to
whom you can call and who can call you (network service).
Confirm SIM services — You can set the device to display
confirmation messages when you are using a SIM card service
(network service).
Certificate management
Select Menu > Settings and Phone > Phone mgmt. >
Security settings > Certificate management.
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.
Select from the following:
Authority certificates — View and edit authority
certificates.
Trusted site certificates — View and edit trusted site
certificates.
Personal certificates — View and edit personal certificates.
Phone certificates — View and edit device certificates.
Digital certificates do not guarantee safety; they are used to
verify the origin of 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
device are correct.
View certificate details — check authenticity
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.
You are notified if the identity of the server is not authentic
or if you do not have the correct security certificate in your
device.
To check the details of a certificate, select Options >
Certificate details. The validity of the certificate is checked,
and one of the following notes may be displayed:
Certificate not trusted — You have not set any application
to use the certificate.
Expired certificate — The certificate validity period has
ended.
Certificate not valid yet — The certificate validity period
has not yet begun.
Certificate corrupted — The certificate cannot be used.
Contact the certificate issuer.
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