Nokia N75 - Manual (Page 126)

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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. If you forget any of these
codes, contact your service provider. See "Glossary of PIN
and lock codes," p. 93.
Avoid using access codes similar to the emergency numbers
to prevent accidental dialing of the emergency number.
Autolock period —You can set an autolock period, a
time-out after which the device automatically locks.
To turn off the autolock period, select
None .
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 .
Lock if SIM changed —You can set the device to ask for
the lock code when an unknown SIM 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 service
(network service).
Glossary of PIN and lock codes
If you forget any of these codes, contact your service provider.
The personal identification number (PIN) 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.
The UPIN code—may be supplied with the USIM card. The
The USIM card is an enhanced version of the SIM card and
is supported by UMTS mobile phones.
The PIN2 code—(4 to 8 digits) is supplied with some SIM cards,
and is required to access some functions in your device.
The lock code (also known as security 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.
The personal unblocking key (PUK) code and PUK2 code
(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.
N75.EN_ESv1_BIL_9252942.book Page 93 Monday, April 2, 2007 3:31 PM