Samsung SGH-D606 - Manual (Page 146)

Settings
140
♦
Disable: you can access the menus normally.
♦
Enable: you can access the menus only after entering your
password.
Note: The password is preset to “00000000” at the factory. To change this password, see
page 139.
SIM lock
When the SIM lock feature is enabled, your phone only works with
the current SIM card.
♦
To enable the SIM lock, you must enter the current SIM lock code.
Once you have entered the SIM lock code, you must confirm by
entering it again.
♦
To unlock your SIM card, you must re-enter the SIM lock code.
FDN mode
FDN (Fixed Dial Number) mode, if supported by your SIM card,
allows you to restrict your outgoing calls to a limited set of phone
numbers.
The following options are available:
♦
Disable: you can call any number.
♦
Enable: you can only call phone numbers stored in the FDN
Contacts. The FDN Contacts is a separate Contacts list and is
managed separately from the normal Contacts list. You must enter
your PIN2.
Note: Not all SIM cards have a PIN2. If your SIM card does not, this menu does not
display. Furthermore, PIN2 is specific to a SIM card and you will need to ask the issuer of
the SIM card for the PIN2 code.