

I called 911 a few years ago and they had a police officer call me back when he got to my neighborhood. I had to do this a few times as the incident repeated a few days later. Each time the officer called me his number was hidden.
That’s the only time I’ve ever had a call from a hidden number that was not a scam, but I would be hesitant to block them all
In addition this was back when airlines had strong restrictions on wireless being used on planes, so many devices had physical switches to turn WiFi/Bluetooth off. Maybe it’s still turned off