Same issue, just started yesterday. Suddenly my house is a dead zone and all devices show NO SERVICE,  as soon as we leave our signal comes back but why all the sudden and no help from verizon other than we are in a variable coverage area but we've never been told that and would've went to a different carrier initially if we had known. They say it should eventually come back but no timeframe and no reason why all the sudden we are just out of luck. Extremely frustrating for what we pay for 4 devices.