The first step is to find an audio sonnerie mp3 file on your phone that you want to use as a ringtone. This can be a song, a snippet of an existing track, or another type of clip. Once you've found a file, it's time to move it to the appropriate folder on your device.
Android phones come with a number of standard ringtones, as well as an option to browse and select custom sound files. You can also download ringtones from the Google Play Store and add them to your phone.
A ringtone can help you distinguish calls from different people or groups. It can also help you remember who's calling if you don't have the contact information in front of you.
When you're ready to set a new ringtone, head to the Settings app and choose Sound. From there, you can experiment with a variety of options until you find the one you like the most.