A:AnswerIts range is up to 1900 sq feet, unfortunately it will not reach the desired 2800 sq feet. You will be short by 900 sq feet (which is a lot!) . Check out other routers with "AC2800" or above.
A:AnswerJust remember that Verizon Fios uses Ethernet cables. If the router you want has Coaxial cable & no Ethernet input (or WAN port), keep on searching.
A:AnswerFrom what I understand... it should work but these routers are designed for faster Internet speed. You'll have an expensive router underperforming. DSL goes up to 100 Mbps and these routers can go minimum 900 Mbps.