I don't understand what you're doing or what you mean by 'using' your device for only four hours a day. If it's plugged in, it's on but it's only listening, it's not accessing anything that would take bandwidth. It also doesn't download as such (if anyone's getting Netflix on their devices, I haven't heard of it), but it does stream music and podcasts and the like from e.g. Amazon or Spotify, and you can access radio stations from almost anywhere. Could you say a bit more about what it is you're using your device for, and what 'using for four hours' means then people who know more than I do might be able to help.