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Tools
PIN code (or UPIN code) / PIN2 code / Lock code — to
change the codes
Autolock period — to set a time-out after which the
phone is automatically locked. To use the phone again, you
need to enter the correct lock code. To turn off the
autolock period, select None.
Lock if SIM changed — to set the phone to prompt for the
lock code when an unknown, new SIM card is inserted into
your phone. The phone keeps a list of SIM cards that are
recognized as the owner cards.
Closed user group (network service) — to specify a group
of people whom you can call and who can call you. For
more information, contact your network operator or
service provider. To activate the default group agreed on
with the network operator, select Default. If you want to
use another group (you need to know the group index
number), select On.
Confirm SIM services (network service) — to set the
phone to display confirmation messages when you use a
SIM card service
Certificate management
Digital certificates do not guarantee safety: they are used
to verify the origins of software.
To view a list of authority certificates that have been
stored in your phone, select Menu > Tools > Settings >
Security > Certif. 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.
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