There are a few ways to get free ringtones on your iPhone without having to use a computer. One way is to sign up for a free account with one of the many music streaming services like Spotify, Pandora, or Apple Music. Another way is to search for ringtones on the App Store and download them directly. Finally, you can also find free ringtones online by visiting websites like Ringtones.com or ToneBuddy.com.