content: It looks like the WHO is more inconclusive than anything. They lean toward cell phones not really doing anything. http://www.who.int/mediacentre/factsheets/fs193/en/ We should worry more about solar radiation, and the effects during air travel. But, even then, it's not worth loosing any sleep over either. https://www.hps.org/publicinformation/ate/faqs/commercialflights.html