Huh, I didn't know that they could be customized for different callers. Will have to read the manual for mine. I have the Overture from the Barber of Seville for everybody (it was the only one that I liked of the ones that came loaded onto my phone). I'd like to find an old dial-phone-type ringer sound for my husband's phone (he likes old phones).
Depends on your carrier and phone, I believe.