Polyphonic Ringtones Polyphonic ringtones brought a new level of sophistication, allowing for more complex musical tones. However, they still paled in comparison to what was to come. MP3 Ringtones The introduction of MP3 ringtones was a game-changer. It enabled users to set their favorite songs as their ringtones, personalizing their devices like never before. This marked the beginning of the pop music ringtone era.