Originally, dzwonki na telefon za darmo were made by electromechanically striking telephone bells. Today, ringtones can include recordings of original telephone bells as well as many other sound clips.
A ringtone can be a monophonic tune or polyphonic tune. A monophonic tone is a series of tones that are played one at a time, while polyphonic tunes use a variety of tones that create a musically harmonized song.