Ringtones are sound files that play on your phone when a call comes in. They can be set to any tune, jingle, or audio clip.

The best way to download ringtones is to use the free sonnerie website. The site helps you find and download your favorite ringtones easily and for free.

How to change the ringtone or notification tone on your iPhone and iPad
To change the ringtone or alert tone on your iPhone or iPad, tap Settings | Audio Haptics. Then, under Sounds and Vibrations, tap the ringtone or alert you want to change and select it.

You can also set a different ringtone for each contact to know who is calling without opening the screen. For example, you can set the same ringtone for your work and home contacts, or set a different ringtone for your parents.