How do you change the sound people hear when they are calling you when i am calling my friend i hear music then he picks up. if someone is calling me i want them to hear music i have a w580i sony E?

YOUR ATTEMPTS WON'T BE USLESS!!!

i know what your talking about

its called a ringback and you can download them to your phone and select certain ones for certain callers but i am pretty sure that you have to pay for them