Samsung SGH-x426 User Manual page 83

The password is preset to "00000000" at the factory.
To change the phone password, see the Change
Password menu (Menu 4.5.4) below.
Once you have entered a new password, you are
asked to re-enter it for confirmation.
The following options are available:
Disable: you are not asked to enter the phone
password when you switch the phone on.
Enable: you are required to enter the phone
password when you switch the phone on.
Change Password
(Menu 4.5.4)
The Change Password feature allows you to change
your current phone password. You must enter the
current password before you can specify a new one.
The password is preset to "00000000" at the factory.
Once you have entered a new password, you are
asked to re-enter it for confirmation.
SIM Lock
(Menu 4.5.5)
When the SIM Lock feature is enabled, your phone only
works with the current SIM. You must enter the SIM lock
code.
Once you have entered the lock code, you are asked to
confirm it by entering it again.
To unlock the SIM, you must enter the SIM lock code.
Phone Settings
79