Where is the iPhone xylophone ringtone from?

The iPhone xylophone ringtone can be found in the Settings app under Sounds > Ringtone > Classic. A lot of iPhone users believe it is a familiar sound, perhaps from a TV show or movie. The most popular theory is that the ringtone resembles a song from the American Beauty score. The song most people are referring to is Thomas Newman's "Any Other Name" which you can hear in the YouTube video below.

Reddit users have decided that it isn't from anything particular and it just sounds familiar. Other suggestions include the opening theme songs from Six Feet Under and House. Thomas Newman also wrote the main title theme for Six Feet Under.