Honestly I don't get where this fear comes from. Phones do not emit ionizing radiation. Unless radiation is ionizing, it isn't going to hurt you.
Visible light is closer to being ionizing than cell phones. Hell, if you walk outside and get exposed to ultraviolet light from the sun, that is ionizing, and in the EM spectrum it sits way way WAY above radio waves caused by cell phones.
Just to illustrate what I mean: