Ultimately, the "best" sound is the one that fits your personal style and usage scenario. Don't be afraid to try out different types.
iOS is more restrictive and requires converting the MP3 to M4R format using a computer or a tool like GarageBand, and then syncing via iTunes/Finder. Alternatively, you can use the Messenger app's internal sound settings to change the sound for Messenger calls/texts. Tips for Choosing the Right Sound facebook notification sound mp3 download best top
I can provide direct links to the safest platforms or guide you through formatting your audio file. Ultimately, the "best" sound is the one that