I just thought I would check back in on this again. After doing a little research, all I could find is that Chromecast needs to be connected to a network in order for it to mirror. Seems like the Fire Stick (might be useful as I have Amazon Prime) would work using Miracast. Is this right, or has someone found a way to mirror your screen to Chromecast without being connected to a network? The one thing I read about Miracast is that you have to leave your phone screen on as well so if there is any way to avoid that, it would be nice. But then again I guess the phone would be plugged in so it shouldn't matter too much. I just want to be able to either watch movies saved on my phone or connect my phone to the hotel's wifi and watch Netflix movies.