In a home emergency I pick up one of many DECT wireless phones around the house
In an emergency in public, I yell "Help!" and 20 phones come out.
In a major emergency when cell phone lines are down I can tune to the frequency of my local police and yell at them all to come to me. They never deploy any useful encryption on those things.
So far so good. Even when I totaled a vehicle. Always reliably other people around with emergency phones so I do not need one.
In an emergency in public, I yell "Help!" and 20 phones come out.
In a major emergency when cell phone lines are down I can tune to the frequency of my local police and yell at them all to come to me. They never deploy any useful encryption on those things.
So far so good. Even when I totaled a vehicle. Always reliably other people around with emergency phones so I do not need one.