A: You’ll need to be able to stay in contact with the world outside of your own home. This is true whether you just want to keep in contact with loved ones, or set up a perimeter system within your community. Devices, like the Beartooth works on a cell phone even when cell service is gone. A stack of $40 UHF/VHF walkie-talkies will still work when all the consumer bands are jammed up.
