Is there any way that i can download a free ringtone for a US Cellular phone?

no you have got to pay.

I don't know if your phone has bluetooth, infrared or other connectivity cable. If it has, go to http://www.magix.net and download the free version of Magix ringtone maker. With it you can convert any music you have (on CD or your computer) to a format your cellphone can use. This way you get exactely the ringtones you want on your phone.The free version only allows you 3 ringtones, but if you really like it you can get the e-version for about $18, from the same site.It's a really good program - the best I've come accross. Enjoy.