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lowercase characters can be used. The device notifies you if the lock code is not
properly formatted. Keep the new code secret and separate from your device.
Phone autolock period — To avoid unauthorised use, you can set a time-out after
which the device automatically locks. A locked device cannot be used until 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).
Manage certificates
Digital certificates protect your content when transferring confidential information.
Certificates should be used when connecting to an online bank or another site, or to
a remote server for actions that involve transferring confidential information.
Certificates should also be used when 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 Menu > Settings and Phone > Phone mgmt. > Security > Certificate
management and select the desired certificate type.
Digital certificates do not guarantee safety; they are used to verify the origin of
software.
Important: The existence of a certificate considerably reduces risks involved in
remote connections and software installation. To benefit from increased security,
certificates must be used correctly, and they must be correct, authentic, or trusted.
Certificates have a restricted lifetime. If they have expired or are invalid, check that
the current date and time in your device are correct.
Security module
The security module provides security services for different applications.
Select Menu > Settings and Phone > Phone mgmt. > Security > Security module
and the desired security module.
Settings 105