Well...the world and time I came from is also a little bit behind the times compared to this one, but I'll explain as best as I can. Humans don't have devices like this, though similar ones do exist in the Spirit World. As for magic, some humans can have abilities to manipulate their spirit energy in different ways, but that's not really magic. Spirit beings like myself can manipulate their energy however they are shaped and demons--well--demons can do so much more than that.