But GUESS WHAT?!?!? It actually works!
When you call the Hogwarts Hotline number, you will be given a menu of options to learn more about Hogwarts. After a few minutes, though, the number will give a “Muggle Alert”, and it will inform you that you are indeed a Muggle, and the Obliviate Charm will be performed over the phone, and you will hear a fake “your call has been disconnected” message. Try it! It’s fun!