Honestly not sure man. I just have my note 4 rooted (thanks to all the XDA contributions and zero Max's vids, you are all awesome) and gave the setup I described. I have a second line dedicated as a hotspot with a Netgear wireless Ethernet adapter to a router in my home. It may just be your tower demand. I live in the country so the benefit I get is string Verizon service / speeds with no fear of hot spot phone prioritization. There just isn't enough people out here to put the stress on the tower. So my other devices such as my daily phone are always on wifi when at home so I don't get screwed over and prioritized when I drive to Minneapolis. Best part about this set up is that everyone who is connected to my home wifi gets a VPN built in due to the way it's set up.