Certificate Management - Nokia N73 User Manual

Lock if SIM changed—You can 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 recognized as the owner's cards.
Closed user group—You can specify a group of people to
whom you can call and who can call you (network service).
When calls are limited to closed user groups, calls may be
possible to the official emergency number programmed
into your device.
Confirm SIM services—You can set the device to display
confirmation messages when you are using a SIM card
service (network service).
Glossary of PIN and lock codes
If you forget any of these codes, contact your service
provider.
Personal identification number (PIN) code—This code protects
your SIM card against unauthorized use. The PIN code (4 to
8 digits) is usually supplied with the SIM card. After three
consecutive incorrect PIN code entries, the code is blocked,
and you need the PUK code to unblock it.
UPIN code—This code may be supplied with the USIM card.
The USIM card is an enhanced version of the SIM card.
PIN2 code—This code (4 to 8 digits) is supplied with
some SIM cards, and is required to access some functions
in your device.
Lock code (also known as security code)—This code (5 digits)
can be used to lock the device to avoid unauthorized use.
The factory setting for the lock code is 12345. To avoid
unauthorized use of your device, change the lock code.
Keep the new code secret and in a safe place separate
from your device. If you forget the code, contact your
service provider.
Personal unblocking key (PUK) code and PUK2 code—
These codes (8 digits) are required to change a blocked
PIN code or PIN2 code, respectively. If the codes are not
supplied with the SIM card, contact the operator whose
SIM card is in your device.
UPUK code—This code (8 digits) is required to change
a blocked UPIN code. If the code is not supplied with
the USIM card, contact the operator whose USIM card
is in your device.

Certificate management

Digital certificates do not guarantee safety; they are
used to verify the origin of software.
In the certificate management main view, you can see a
list of authority certificates that are stored in your device.
Press to see a list of personal certificates, if available.
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.
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