Is there such an app that you can put a pool of ringtones in to make the phone randomly choose a song to play when someone calls? Like if someone doesn't have a certain ringtone... The default be a randomly selected tone?
There are a number of ringtone shufflers out there in the market. Alternatively, you could get Tasker, a phone automation app, that will rotate ringtones (not shuffle) if you ask it to. And Tasker does so many other things as well, all in one app. I use Tasker to rotate between 11 different ringtones.