We just bought a new router with higher wifi speed it is an AC 1200 dual band Belkin. When we had our Belkin N 300 router it was too slow for the internet but it got good distance with our wifi on our phones now that we have the 1200 series which is higher speed Internet we seem to be losing distance from one room to another in the signal of the wifi we can't even go 30 feet and we lose total wifi internet connection. Who is the problem with the router the internet or the mobile phone company?we have tried calling all three and each one passes the buck to the other. Does anyone have an answer?