How do I make my galexys use ringback tones?

[Mayo 85]

I want my phone to play songs for the people that call in instead of the ringing nosie.

 

[chanchan05]

As far as I know that's not a function of the phone. If I want that on my phone I sign up for that service with my carrier. The song I choose will play back for callers no matter what my phone is, even if I slap my sim card into my old 3310.

 

[Rukbat]

The ringback tone is generated by the caller's carrier's central office. Until you answer, the caller can't hear anything you do.