This Question Will Be On the Test

Q: Why do cell phones all play music when they go off, but normal phones all ring or make electronic tones?

Sample answer: Because we have been locked into certain cultural patterns. Cell phones "ought" to play music, and therefore new cell phones sell better if they do play music. Originally, cell phones played music because they resembled other portable electronics, which mostly also did. Normal phones, on the other hand, have been ringing for hundreds of years, so cultural biases favor new phones that also ring.