What are ringback tones?

Question

What are ringback tones?

Answer 1

its the song people hear when they are calling u, instead of hearing ringing

Answer 2

rinback tones can only be set by your carrier. you have to pay.  

Answer 3

ringback tones are a service that lets the caller hear an audio clip (song or message) when they call your phone. Typically, callers would hear a standard ring, but instead they hear this. Ringback Tones are a monthly service usually $1-3 per month.

hope this helps:-)