How to put free music in iPhone 4s?

Please help! My phone is really boring without music. I tried putting music in it by going to iTunes on my pc but it is not working for some reason. Any ideas?

I don't know how to download free music but
iHeart Radio is a good app that allows you to Listen to radio stations around the country and create custom stations.

Download it with torrents, and pass it to the phone by bluetooth

It's simple. You either buy it from iTunes or download it illegally

For best music in your iphone search in google or music search site. This is best way i think. However, if you want you may visit sb site iphone info.