The other thing that I read a while ago was having walkie-talkies that work. We have a set of four that are the same as our immediate neighbor’s. Telling your neighbors to use a set frequency (with a back up frequency in case of too much chatter) means that you communicate house to house without phones.
Believe it or not, I put them into the microwave in our camper. We are set for an EMP (I hope).
That - might - actually work.
I never heard anyone suggest it, before.
But, when you get right down to it, a microwave oven IS a farrady cage.
Who knew?