My first thought was amateur radio operators. We have a club here in town and many of the guys are almost fossils so I guess it can't be that bad. Not 100% sure about cell phones though. I think in general they are safe as long as you respect them, but if you are like my cousin having it strapped to her body all day, well, she has a tumour exactly where it is strapped, and there are too many cases exactly like that, but just to be clear, I won't be strapping my smart meter to my chest any time soon. The main reason I didn't want the smart meter was because they have a lithium battery inside that can pop and from what I read, that was the main reason houses burn down with smart meters if the battery is faulty.