Setting a free ringtone on your iPhone can be done by following these steps:
Choose a Song or Sound: First, identify the song or sound you want to use as your ringtone. This can be a file already on your computer, or you can use various websites and apps to download free ringtones.
Convert to AAC format: iPhones use the AAC format for ringtones. If your chosen sound isn’t in this format, you’ll need to convert it. You can use iTunes or free online converters for this purpose.
Edit the Length: Ringtones should be no longer than 30 seconds. Use iTunes or another audio editing tool to trim your sound to the desired length.
Change File Extension: Once you have your AAC file, change its extension from .m4a to .m4r, which is the extension for iPhone ringtones.
Add to iPhone: Connect your iPhone to your computer and open iTunes (or Finder if you’re using macOS Catalina or later). Drag the .m4r file to your iPhone’s “Tones” section.
Set as Ringtone: On your iPhone, go to Settings > Sounds & Haptics > Ringtone. Your new tone should be listed here. Tap it to set it as your ringtone.
Keep in mind that the exact steps might vary slightly depending on the version of iTunes and your operating system. Also, ensure that the source of your ringtone is legitimate and that you have the right to use the sound.