As a proxy, I can, with 100% Certainty tell you that you CANNOT, in any way, shape or form, login to any sportsbook app licensed in the state of Nevada from outside state lines. That was one of the stipulations the gaming control board set fourth before permitting it to be given the green light.
The sportsbook operators (Cantor, Stations, etc) have to spend countless amounts of money continuously to make sure they stay within the GCB (Gaming Control Board) regulations to keep their mobile betting in accordance with the law. Thats why they have so many checks in place when you log in (GPS, WiFi, Tower signal, etc).
It isnt possible. Sorry man, no way to can bet from outside of Nevada using the app.
And if you need another reliable proxy, I can help. I have quite a few people that can vouch for me.