Even then; the human body is pretty good at dealing with excess heat, and conservation of energy says you can’t get more energy deposited than the transmitter p

Even then; the human body is pretty good at dealing with excess heat, and conservation of energy says you can’t get more energy deposited than the transmitter puts out - even if you absorb 100% of the signal that’s still only 100mw or so for a phone (vs ~2000w for a microwave oven).