Portable terminal device and method of notifying an incoming call

A portable terminal device capable of emitting a random ringtone, includes a call arrival processing device, in which a radio broadcast is set as one of the items of information indicating the type of ringtone in set data, and the frequency of radio broadcast signals set as a ringtone is detected out of the frequency information in the set data. If the power of the signals of this frequency is at or above a prescribed level, then signals of that frequency are fed to a loudspeaker to cause a radio broadcast to sound as a ringtone.