The Nokia ring is based on Gran Vals, a short guitar piece written by Spanish composer Francisco Tárrega in 1902, which Nokia later adopted as its signature phone tone in the 1990s. As Nokia handsets spread around the world, the melody became one of the most widely recognised sounds of the mobile era, heard in streets, offices, and classrooms. Today creators still use it because it instantly reads as a phone call without any explanation, and its simple, dated tone carries a strong sense of nostalgia for early mobile phones.