Right-click on an mp3 ringtone to download it to your computer (the m4r files are for iPhones). Either import it directly into your phone using an appropriate cable, or try this "ringtone uploader" (provided by FunForMobile). Type in the required data, pressing the "browse" button to find the mp3 on your computer. Ringtones are free to send to your cell phone from this site, but mobile web will be needed to download the ringtone to the phone once the text message is sent. If you do not have monthly mobile web access included in your mobile plan, you may be charged for accessing it.