User guide

Remote phone locking — Enable or disable remote lock.
Closed user group — Specify a group of people to whom you can call and who can call
you (network service).
Confirm SIM services — 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 > 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:
58 Settings