Comment by nunobrito

That is a question you can answer yourself when trying it out.

In Portugal +90% of tetra stopped working. DMR only locally.

Satellite APRS continued working. Who will listen? Well, those from north to south on the country were listening. More important, they were listening who was still active because those were the stations running with their own energy because even FM stations started to go down quickly as the generators ran out of fuel.

Had the blackdown lasted a week, those with a 20 euros walkie-talkies would very likely be the only ones still capable of +50 km distance communications and +1700 km reach using satellite APRS text messages.

Try to see from it from that perspective. You really won't have electricity nor cellphone coverage and not even FM in such scenario.. It's all gone.