My missus told me about this and we got to thinking......would we all get a text or something? Would all the telecomms providers send one out? What would it say?
“No point running and hiding, you are going to die. Have a nice day. Vodaphone”
If need be yes, it would be either a CBS (Cell Broadcast) or a Location Flash SMS, either of these would come up on your Screen straight away and dont rely on you going to your inbox to read the Massage. It wouldn't be down to the Networks to send this out as various Gov Depts have a Gateway into the Networks as part of their Public Emergency Alerts Program.
But again, by the time most would see these messages we would all be dead.
I repeat, as during the Cold War, when nuclear weapons were not as powerful as now, we knew we would not survive, and we said between ourselves that it would be better to be killed quickly in the first strike than linger on for a very slow and painful death. The public service films on what to do if
the day came where just 'dangle berries', and eventually admitted to be so.
Now, let us hope it never happens, but if it does, forget any warnings, just die quick without knowing what happened!