There's a video on YouTube of a doctor showing his beeper/pagers how it works and why he still has one. He goes two or three floors down in the hospital into a

There's a video on YouTube of a doctor showing his beeper/pagers how it works and why he still has one. He goes two or three floors down in the hospital into a shielded room. His phone utterly lost no bars but the beeper worked fine. Found it https://www.youtube.com/watch?v=uAwW9arTxGo https://www.youtube.com/watch?v=uAwW9arTxGo