Find "FDN Phone List"
Press Connect.
Press the Menu key.
Scroll to Options and press the Navigation key.
Scroll to FDN Phone List and press the Navigation key.
Activate or deactivate
Press the Navigation key.
Highlight Enable FDN Mode or Disable FDN Mode (depending on the current setting) and press the Navigation key.
Key in the PIN2 and press the Navigation key.
Exit
Press Disconnect to return to standby mode.