If you have a smartphone that is missing a custom ringtone, you can make one yourself by using a recording app on your phone. To make a ringtone, you can record a short sound clip and save it as an MP3 file. It is recommended to record a sound clip that is 15 to 30 seconds long. Some mobile carriers allow you to customize the ringtone that plays before voicemail. A ringtone file is approximately 300 KB in size https://klingeltonkostenlos.de/
