To change the ringtone on your iPhone, follow these steps:
Open the Settings app on your iPhone. It’s typically represented by a gray gear icon.
Scroll down and tap on “Sounds & Haptics” (or “Sounds” depending on your iOS version).
In the “Sounds and Vibration Patterns” section, you’ll see different options for various sound settings.
To change the ringtone, tap on “Ringtone.”
You’ll be presented with a list of pre-installed ringtones. Scroll through the list and tap on the one you want to set as your ringtone. You can tap on each ringtone to listen to a preview.
If you want to use a custom ringtone that you have downloaded or created, scroll to the top of the list and tap on “Tone Store.” This will take you to the iTunes Store where you can browse and purchase ringtones.
After selecting a ringtone, it will be automatically set as your default ringtone.