...You get more electromagnetic radiation from warming a coffee in the microwave oven than from a cell phone tower.
Have you ever checked your microwave for a leak?
https://www.wikihow.com/Check-a-Microwave-for-Leaks
Those microwave meters look like a good idea too. Thanks for the link to the article. One thing about microwaves is that like all EM radiation, they follow an inverse square law so that a few feet of distance drops radiation levels very low. And 5G radiation has a very hard time penetrating buildings.
I think 5G will be a big disappointment. If you can't use it inside, what's the point?