The Fire TV cast box is on sale on Amazon ($100 off), and I am thinking of buying one. It has the built in DVR, no charges. But I cannot understand how to active it. Does anyone have one? Do you like it? Since Dish does not have a guide on many OTA channels, I figured this might be a nice add on. I have two Roku's and the Fire TV. Anyway, do I need a cel phone or tablet to active it, or can I use my laptop? My cel phone is an older Galaxy S4. I do not do well figuring out things on the phone. Everything else, fine. Thanks.