This article explains how to make a song a ringtone on Android. You can set the ringtone for all callers or just specific contacts. To follow most of these steps, your phone must be running Android 9.0 Pie or later.
How to Set a Song as Ringtone on Android Phone – Complete Guide
In a few simple steps you can change your ringtone to something more personal than the default ringtones that come with your smartphone. Here’s what you need to do:
The option you’re looking for is in the Settings app. These instructions were created using a Pixel phone, but other devices work in a similar way.
Open the Settings app and tap Sounds & vibration.