I'm trying to figure out if I can do this with Fios. It's not looking good. Maybe they've really hidden the location where you would enter Smart DNS servers.
Quick Update: Looks like I didn't even need to use DNS servers in another country. Tonight I changed my router settings to use the SmartDNSProxy servers in Northern Virginia (primary) and New Jersey (secondary) and I still had no problem watching tonight's Orioles-Yankees game on MASN on my computer, my Roku and my FireTV. Since this is working for me, I'm probably not even going to try Unlocator.