
Cell Tower
The signal is carried by cell towers, we've all seen them blighting our landscape.
If the power goes off at
the towers, no bars on your phone.
There are several Home Security companies currently advertising how much more 'secure' you are, using their Wi-Fi base station over the 'old fashioned'
Land Line. When the power goes down, you don't lose your Land Line's ability to function. Do your own research.