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Fixed dialling allows you to select which numbers can be called from your phone. When fixed dialling is turned on, it's only possible to make calls to your fixed numbers and to emergency numbers. Follow these instructions to turn fixed dialling on or off.
Find "Fixed Dialling Numbers"
Press the menu icon.
Press Fixed Dialling Numbers.
Turn fixed dialling on or off
Press Enable FDN or Disable FDN (depending on the current setting).
Key in the PIN2 and press OK.
Press the Home key to return to standby mode.