Find "Fixed dialling numbers"
Slide your finger down the display starting from the top edge of your phone.
Press Settings.
Press Settings.
Press Call settings.
Press Fixed dialling numbers.
Turn fixed dialling on or off
Press Activate fixed dialling or Deactivate fixed dialling (depending on the current setting).
Key in your PIN2 and press OK.
Return to the home screen
Press the home icon to return to the home screen.