Nokia 100
Find "Change barring password"
Press Menu.
Scroll to Settings and press Select.
Scroll to Security settings and press Select.
Scroll to Change access codes and press Select.
Scroll to Change barring password and press Select.
Change barring password
Key in your current barring password (default is 1919) and press OK.
Key in the new barring password and press OK.
Key in the new call barring password again and press OK.
A request to change the barring password is sent to the network.
A request to change the barring password is sent to the network.
Exit
Press Disconnect to return to standby mode.