If you want to select the numbers your mobile phone can call, you need to turn on fixed dialing. Once done, you can only call the selected numbers and emergency numbers. Follow these easy instructions.
Tap the phone icon.
Tap the menu icon.
Tap Call settings.
Tap Fixed dialing numbers.
Tap FDN list.
Tap the new contact icon.
Tap the field below "Name" and key in the required name.
Tap the field below "Number" and key in the required number.