If you want a custom sound for your mobile phone, you can download free ringtones. Most ringtone websites are free to join, and they have a large community of users https://tonosparacelular.net/iphone/ They also have a variety of categories, including the most popular, downloaded, and rated ringtones. Some of these sites even let you create your own free ringtone. Once you've uploaded your sound file, you can choose the start and end times, and click the "Make Ringtone" button.

Many mobile phone manufacturers offer free ringtones as part of the package with every phone model that they sell. The freebies are usually special effect sounds from the manufacturer. For instance, the trademark ringtone of a Nokia or Sony Ericsson phone may feature the sound of a waterfall, or a birdsong.