This app was mentioned in 2 comments, with an average of 1.00 upvote
Well, this is a little bit off-top, but if you want to customize ringback tone that YOU hear - you can do it - Free https://play.google.com/store/apps/details?id=com.inoysoft.callbeepchanger_free It works the way it supposed to be initially :)
There is a solution against somebodys ringbacks. This is not a spam, just trying to help: Free Android app - https://play.google.com/store/apps/details?id=com.inoysoft.callbeepchanger_free