Mike uses his phone as his internet access and he wants to use Netflix from his Android phone wired to his HDTV, but he has issues with audio sync. Leo suspects that the phone isn't powerful enough to drive it. He did get a Chromecast, but it requires a Wi-Fi signal to work.
There are other options. Leo says that using a MiFi card may help, because then it would convert the 4G signal to Wi-Fi. Also, because he rooted the phone, that could be adding to the issue. But rooting helps him to tether and use the Chromecast that way. This could violate his deal with Sprint, though.
Easy Tether will do tethering without rooting. But he'll probably end up having to pay for the privilege.