<P> Several nations have advised moderate use of mobile phones for children . A journal by Gandhi et al. in 2006 states that children receive higher levels of Specific Absorption Rate (SAR). When 5 - and 10 - year olds are compared to adults, they receive about 153% higher SAR levels . Also, with the permittivity of the brain decreasing as one gets older and the higher relative volume of the exposed growing brain in children, radiation penetrates far beyond the mid-brain . </P> <P> Products have been advertised that claim to shield people from EM radiation from cell phones; in the US the Federal Trade Commission published a warning that "Scam artists follow the headlines to promote products that play off the news--and prey on concerned people . </P> <P> According to the FTC, there is no scientific proof that so - called shields significantly reduce exposure from electromagnetic emissions . Products that block only the earpiece--or another small portion of the phone--are totally ineffective because the entire phone emits electromagnetic waves . Such shields "may interfere with the phone's signal, cause it to draw even more power to communicate with the base station, and possibly emit more radiation ." The FTC has enforced false advertising claims against companies that sell such products . </P>

Where does radiation come from in a cell phone