Re: Inquiring minds...
You forgot this. At 2W it is working on 900Mhz. It is at 33,33cm. So the radio wave it self is too big to harm you, your cells and your DNA. It just does not happen. It is also non-ionizing radiation. So no harm there.
Your physics is wrong. The wavelength being bigger than your head doesn't mean it cannot interact. It just means you need to use different mathematics to properly model it. (Were you right, holding a nail and sticking it into the live hole in a plug would be harmless ... a mere 50 Hertz! )
It is absorbtion of EM radiation that makes your ear get hot, at least in part. And the calculation is that the nearest parts of your brain may be warmed by a small fraction of a degree celsius by the same radiation.
Harmless? Almost certainly. Your normal body temperature fluctuates daily by more than this amount, and it rises by much more and at a greater rate in response to a mild infection. Nevertheless, "no biologic effects" is provably untrue.
There's also a putative mechanism whereby HF radiation could cause Zeeman splitting of energy levels in free radicals causing more of them to escape destruction by the body's anti-oxidants at the site where they are generated. They could then be free to cause damage to less-well-protected tissue further afield. Experimental proof of the effect would be VERY hard to come by, the effect would be small, the epidemeology proves mobiles are mostly harmless, but the physics is impeccable.