Find "Call Blocking"
Press the call icon.
Slide your finger down the display starting from the top edge of your phone.
Slide your finger down the display starting from the top edge of your phone.
Press Settings.
Press Call Blocking.
Change barring password
The current settings will be displayed.
Press Change Password.
Press Change Password.
Press Enter current password and key in your current barring password (default is 0000).
Press Enter a new password and key in the new barring password.
Press Enter new password again and key in the new barring password again.
Exit
Slide your finger up the display starting from the bottom edge of your phone to return to standby mode.