Nokia N91 8GB - Phone and SIM

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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. 108.

PIN code

,

PIN2 code

, and

Lock code

—You can change the

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. 108.

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.

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Tools

108

Copyright © 2006 Nokia. All rights reserved.

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

None

to

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

. A list of

commands opens. Select

Lock phone

. For information

on Lock switch see ‘Keypad lock (keyguard)’, p. 17.

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.

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 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.

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 unauthorised
use. The factory setting for the lock code is 12345. To
avoid unauthorised use of your device, change the lock
code. Keep the new code secret and in a safe place
separate from your device.

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

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Tools

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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.