I don’t believe they’re safe, a necessary evil if I may say so, I use mine sparsely because of my business.
My ex boss in the electronic trade didn’t buy into my concerns about mobile (cell) phones.
We were doing a house call and trying to locate the fault with a TV.
His cell rang, and the TV went completely blank, no button could be pressed that would have had an affect on it, no changing channels etc;
As soon as he hung up, the TV recovered, he looked at me and said “these things can’t be good.”
I did hear of a bunch of students cracking an egg just like the popcorn video, and it cooked.
Anyway I don’t care for cell phones, as for microwave ovens, well they’re protected by a grill.
The microwaves are 12 cm long in a microwave oven, but they can’t get through the protective grill, and a good job too as they’re far more powerful than a cell phone.
I have heard of someone having their liver damaged by a leaking door seal on a microwave oven, I only use mine to heat things, and would never cook a full dinner because I think they destroy the flavour of the food.
Sausages are still white when they’re supposed to be cooked, hence the grill they put in them.
You can put a neon light in a microwave oven, switch it on and it will light, those little lights that you see on kettles or irons.
But only for 2 secs, as they will explode after they light, or a fluorescent tube.
As for my phone, I usually put it on speaker and keep it as far from my head as possible, because I have studied electronics and I simply don’t believe those so-called independent tests, because money talks, money corrupts.