A microwave oven cooks because there is 1000 watts of it in the chamber. You'll be getting micro-watts from cellular transceivers. Below hard ultraviolet, damage from electromagnetic radiation comes from heat it generates. There isn't much heat made by a millionth of a watt.
The cell towers concern you. Why doesn't putting a five watt transmitter against you head?
Why doesn't putting a five watt transmitter against you head? What makes you think it doesn't?
You never heard about glioblastomas until people started pressing electromagnetic transmitters against their heads.