Security - Nokia N91 User Manual

Security

Phone and SIM
PIN code request—When active, the code is requested each
time the device is switched on. Deactivating the personal
identification number (PIN) code request may not be allowed
by some SIM cards. See 'Glossary of PIN and lock codes',
p. 101.
PIN code, PIN2 code, and Lock
lock code, PIN code, and PIN2 code. These codes can only
include the numbers from 0 to 9. See 'Glossary of PIN and
lock codes', p. 101.
Avoid using access codes similar to the emergency numbers
to prevent accidental dialing of the emergency number.
If you forget any of these codes, contact your service provider.
Autolock period—You can set an autolock period, a timeout
after which the device automatically locks and can be used
only if the correct lock code is entered. Enter a number for
the timeout in minutes, or select
autolock period.
To unlock the device, enter the lock code.
When the device is locked, calls still may be possible to the
official emergency number programmed into your device.
Tip! To lock the device manually, press
commands opens. Select
on Lock switch see 'Keypad lock (keyguard)', p. 18.
code—You can change the
None to turn off the
. A list of
Lock phone. For information
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 (network service)—You can specify a group
of people to whom you can call and who can call you.
When calls are limited to closed user groups, calls still may
be possible to the official emergency number programmed
into your device.
Confirm SIM services (network service)—You can set the
device to display confirmation messages when you are
using a SIM card 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
PIN code is blocked, and you need to unblock it before
you can use the SIM card again. See the information about
the PUK code in this section.
UPIN code—This code may be supplied with the USIM card.
The USIM card is an enhanced version of the SIM card and
is supported by UMTS mobile phones. The UPIN code
protects the USIM card against unauthorized use.
101