I use the sling box attached to my dish network hopper quite frequently.......I use an HDMI cable from my smart phone to the LED TV in my motorhome...... I also have Verizon unlimited data......
Thanksgiving week 2013 we were camping and several of the days we had heavy rain.... We used 18 gigs of data in 7 days...... most of it through the sling box..... a little bit through Netflix.....
my sling box was free fom Dish network and worth every penny......