A sonnerie portable is a small piece of audio that plays when your device receives a call, text, or other notification. The sound can be a song, a short snippet from another audio file, or any combination of these. It's a great way to personalize your device and set it apart from the rest.

You can find a wide variety of ringtones on the Google Play Store, including rap music, today's hits, military ringtones, and cute ringtones. Some Android phones, such as the Samsung Galaxy, also have a built-in ringtone that you can select and use for texts, calls, and other alerts.

If you don't have a default ringtone, you can always download one from the Play Store or create your own using a free ringtone maker app that works on many Android phones. You can even set your ringtone to a song you like or make it a looping pattern.