User Manual

code, contact your service provider. If you forget the lock code, contact a Nokia Care
point or your service provider.
• Lock code — The lock code is used to unlock the device. To avoid unauthorised use
of your device, change the lock code. The preset code is 12345. The new code can be
4-255 characters long. Alphanumeric characters and both uppercase and 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).
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
Settings
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