There are a number of ways to get free ringtones sent directly to a cell phone. Most cell service providers offer their customers free ringtones that can be accessed via the phone menu or the provider's website. Other third-party websites offer a variety of tones as well.
These websites generally work the same way. Cell phone users can set up a free account, providing their phone number and provider information. After browsing and finding the desired ringtone, users can click to send it directly to the phone, assuming the phone accepts third-party ringtones. Some models like the iPhone require the user to browse the website on the phone and download the tone manually.