It's a bit bold to only consider ionization as a possible cause of damage.
Molecular chemistry where e.g. protein clusters copy DNA, is very intricate, and introducing electromagnetic resonances in such processes could be potentially disruptive. It's not just your receiver that picks up energy from radio waves, molecules can too (even without losing electrons).
In fact, someone cannot prove mobile phones are safe once and for all unless they tested the entire set of frequencies used in future phone models too.
Molecular chemistry where e.g. protein clusters copy DNA, is very intricate, and introducing electromagnetic resonances in such processes could be potentially disruptive. It's not just your receiver that picks up energy from radio waves, molecules can too (even without losing electrons).
In fact, someone cannot prove mobile phones are safe once and for all unless they tested the entire set of frequencies used in future phone models too.