Open , create a "RECORDS" project, and import your MP3. Trim it to 30 seconds.
Look for high-quality MP3 versions of "İzmir Marşı" (Haluk Levent’s version is a common favorite). Izmir Marsi Zil Sesi
Tap on Phone ringtone and look for an option like "Add" or "Custom ringtone." Open , create a "RECORDS" project, and import your MP3
iOS is more restrictive and usually requires a specific format (.m4r). Download the audio file to your "Files" app. create a "RECORDS" project