My iPhone allows me to set a default ringtone and separate ringtone for my contacts. By setting my default to "Bulletin", which I find pleasing, then setting all my contacts to "old phone" I don't even have to look at my phone to determine who's calling. Kind of a pain in the azz at first, but once set will work very well. If as mentioned, someone I know calls me not in my contact list, they will leave a message. At that point I'll add them to my contacts and change the ringtone. Seems during the day my phone will ring with a relaxing and pleasing sound and then I go Ha Ha.