Ringtones is a large industry. Instead of assigning ringtones based on people or groups on your phone, it would be interesting to be able to assign a ring to an area code or country code.
Then if I get a buzz from a mate in London I hear James Bond music.
From a friend in Oz, “I come from a land Down Under”
If someone calls from Down South you get the Dukes of Hazzard, etc etc.
(If anyone implements this Jim Halberg gets $1 per call)