Find "Call barring"
Press the Menu key.
Press Settings.
Press Calling.
Press Call barring.
Change barring password
Press the menu icon.
Press Edit barring password.
Key in your current barring password (default is 0000) 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 your barring password is sent to the network.
The action is confirmed on the display.
A request to change your barring password is sent to the network.
The action is confirmed on the display.
Exit
Press the Menu key to return to standby mode.