Nokia N91 - Smartphone 30 MB User Manual page 104

PIN code, PIN2 code, and
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. 104.
Avoid using access codes similar to the emergency
numbers to prevent accidental dialling 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
turn off the 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.
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 recognised as the owner's cards.
104 Copyright © 2006 Nokia. All rights reserved.
Lock code—You can change the
None
. A list of
Lock phone. For information
Closed user group
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
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.
to
Personal identification number (PIN) code—This code
protects your SIM card against unauthorised 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 unauthorised use.
(network service)—You can specify a
(network service)—You can set the