Samsung SGH D720, User Manual, Page: 248 / 299

Settings
248
To unlock the phone, in Standby mode, press the
Unlock
soft key, enter the lock code, and press the
OK
soft key.
•
Lock if SIM changed
: Select
Yes
if you want the phone
to ask for the lock code when an unknown, new SIM
card is inserted into your phone. The phone maintains
a list of SIM cards that are recognised as the owner’s
cards.
•
Fixed dialling
: You can restrict your outgoing calls to a
limited set of phone numbers, if supported by your
SIM card. You need the PIN2 code for this function.
When this function is active, you can only call those
phone numbers that are included on the fixed dialling
list or which begin with the same digit(s) as a phone
number on the list.
To activate the Fixed dialling feature, select
Options
→
Activ. fixed dialling
.
To add new numbers to the Fixed dialling contacts list,
select
Options
→
New contact
or
Add from Contacts
.
Note
: When Fixed dialling is activated, calls may be possible
to certain emergency numbers in some networks (e.g.,
112 or other official emergency numbers).
•
Closed user group
(network service): You can specify
a group of people whom you can call and who can call
you. For more information, contact your network
operator or service provider. Select
Default
to activate
the default group agreed on with the network
operator,
On
if you want to use another group (you
need to know the group index number), or
Off
.