The melody behind this ringtone comes from Gran Vals, a guitar piece by Spanish composer Francisco Tárrega, which Nokia adapted as its signature tune in the early 1990s. As mobile phones became common in the late 1990s, the simple tune was heard in streets, offices and schools around the world, making it one of the most recognised sounds of its era. Today it survives online as shorthand for that period, used in memes and edits whenever creators want an instant, unmistakable hint of old mobile phone culture.