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When security features that restrict calls are in use (such as call barring, closed
user group, and fixed dialing), calls may be possible to the official emergency
number programmed into your device.
Confirm SIM services (network service) — to set the phone to display
confirmation messages when you use a SIM card service
Certificate management
A list of authority certificates that have been stored in your phone is
displayed in Certificate management. To see a list of personal
certificates if available, scroll right.
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 device are correct.
Before changing any certificate settings, you must make sure that you really trust
the owner of the certificate and that the certificate really belongs to the listed
owner.
View certificate details and check authenticity
You can only be sure of the correct identity of a server when the
signature and the period of validity of a server certificate have been
checked.
The phone notifies you if the identity of the server is not authentic or if
you do not have the correct security certificate in your phone.
To check certificate details, scroll to a certificate, and select Options >
Certificate details. While opening the certificate details, the phone