Nokia 6681 User Manual page 96

Fixed dialling—You can restrict calls and text messages
from your phone to selected phone numbers, if supported
by your SIM card. You need the PIN2 code for this function.
To view the list of fixed dialling numbers, press
select Tools > Settings > Security
Fixed dialling. To add new numbers to the fixed dialling
list, select Options > New contact
When you use Fixed dialling, packet data connections are
not possible, except when sending text messages over a
packet data connection. In this case, the message centre
number and the recipient's phone number must be
included on the fixed dialling list.
Options in the Fixed dialling
Activ. fixed dialling/Deact. fixed
Edit, Delete, Add to Contacts,
Mark/Unmark, Help, and Exit.
Note: When security features that restrict calls are
in use (such as Call
and Fixed dialling) calls still may be possible to the
official emergency numbers programmed into your
phone.
Closed user group (network service)—You can specify a
group of people to whom you can call and who can call
you.
, and
> Phone and SIM
or Add from Contacts.
view are Open, Call,
dialling, New contact,
Add from Contacts, Find,
barring, Closed user group,
Copyright © 2005 Nokia. All rights reserved.
Confirm SIM services
phone to display confirmation messages when you are
using a SIM card service.
Glossary of PIN and lock codes
>
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
phone.
Lock code—This code (5 digits) can be used to lock the
phone to avoid unauthorised use. The factory setting for
the lock code is 12345. To avoid unauthorised use of your
phone, change the lock code. Keep the new code secret and
in a safe place separate from your phone.
(network service)—You can set the
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