Nokia XPRESSMUSIC 5800 - Manual (Page 98)

the correct lock code is entered. To turn off autolock, select
None .
● Lock if SIM card changed — Set the device to ask for the
lock code when an unknown SIM card is inserted into your
device. The device maintains a list of SIM cards that are
recognised as the owner’s cards.
● 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).
In the offline or flight profiles, you may need to unlock the
device and change to the calling profile before making a call.
When calls are limited to closed user groups, calls may be
possible to the official emergency number programmed into
your device.
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.
Settings
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