People, if you have any science background, read the damn article!
http://www.scientificamerican.com/article/can-you-hear-me-now/
The idea of "Radiation" (meaning electromagnetic radiation) causes cancers applies to short wavelengths radiation such as UV, x-ray, or gamma rays from radioactive decay. These wavelengths have sufficient energies to break the molecular bonds in our bodies, including DNA. Hence, the result of cancers.
The "radiation" (mean waves, rays) used communication have much longer wavelengths, and therefore much lower energies. They cannot cause the molecular bonds in our bodies to break. At most, these long wavelengths will cause the molecules to vibrate or rotate faster to generate heat. But this is the same effect as being in a hot tub or sauna.