How do you add ringtones to a Sprint Samsung phone?

My dad recently got a Sprint Samsung phone and we are trying to add a ringtone to it. We cant add it off the website cause it is with a bussiness and have a data cable. Anyone know any good sites or a way to transfer it over the data cable?How do you add ringtones to a Sprint Samsung phone?Its extremely easy. Which phone do you have. And I can show you how to make you own ringtones and how to send them without a data cable. I also have Sprint so I do this alot..So let me know.