What happens to Fios, Cable, VoIP, and all the other wireline replacements (and their battery chargers) when the power goes off for a few hours or more?
The last time I had this problem, my power was off for two days due to a bad storm. No computer, no TV, no lights, no cable, no nothing, but my low-tech wireline phone kept working the whole time.
We plug the cellphones into the car chargers. They often come with the cellphone, free.
In WWII the Berlin telephone system proved indestructible after years of aerial bombardment and later, Soviet shelling in the final siege in 1945. In the final battle combatants on both sides measured the situation by dialing phone numbers at known locations. Whoever answered, either in Russian or German, signalled the ownership of that location.
Full disclosure, I don’t own a cellphone and don’t care if I ever do. My desktop is on a DSL hookup to my landline, and I am not thus cut off from the world.