from what i've found, there are no such thing as free ring tones. I searched the internet for hours and all i could come up with were shitty beeping ones or ones that you had to like type in each note into a program on your phone. Every site that said you got a free one makes you buy 5 or some shit first.
find a place to download polyphonic ring tones to your comp, and send them in a pix message. dont ask me how, my friend sent me a bunch from his comp. but now i have beverly hills cop, seinfeld, and the works.