4G Network Extender purchased from Verizon. Setup and running great for calls inside the house.
Issue is that as you get away from the Extender (e.g. out in the yard), the Extender won't release the call to the cell tower and so the call quality goes to zero and you have to drop the call.
This seems to be an on-going, long term issue where the "solutions" don't work (Turn off Advanced Calling-nope, change Network mode to LTE/CDMA-nope).
Verizon - We need a way to stop the phone from trying to connect to Network Extenders!
(BTW, this is all YOUR problem as you have cruddy cell coverage in the Boston area so we had to BUY a $250 network extender to use YOUR network at our home so we could PAY you!)