This clip is a fan-made recreation rather than an official recording. According to its original description, it was built in BeepBox, exported as a MIDI file and then converted to MP3 so it would sound classical. That homemade, piano-like character sets it apart from a standard phone ringtone, and it circulates online mainly as a ringtone, alarm and meme sound for people who want a softer, more musical notification instead of a harsh beep.