WHO (World Health Organization) IARC just announced that radiation from cell phones can possibly cause cancer, as reported by CNN. The agency now lists mobile phone use in the same "carcinogenic hazard" category as lead, engine exhaust and chloroform. Note that this is a reversal of WHO's previous position. According to CNN, the Apple iPhone 4 safety manual warns users, "When using iPhone near your body for voice calls or for wireless data transmission over a cellular network, keep iPhone at some distance away from the body." and Blackberry Bold advises users to, "keep the BlackBerry device at some distance from your body when the BlackBerry device is transmitting."
The World Health Organization will announce Tuesday whether exposure to cell phone radiation is a cancer-causing hazard.
Until now, the agency has assured consumers that no adverse health effects had been established from cell phone radiation.
 WHO’s International Agency for Research of Cancer team includes 31 scientists from 14 countries, including the United States. They’ve been reviewing peer-reviewed studies on cell phone safety since last week.
The announcement is not expected to be a yes-or-no conclusion. WHO categorizes environment factors in four groups: carcinogenic — or cancer-causing — to humans, probably or possibly cancer-causing to humans, not classifiable as to its cancer-causing danger to humans, and probably not cancer-causing to humans. Tobacco and asbestos fall in the “carcinogenic to humans” category. Lead, engine exhaust and chloroform are listed in the “possibly carcinogenic to humans” group.