If outdoors . . .: 1st there are many types of radiation. 2nd clothing is great way to block sun exposure (different radiation from cell phone) (http://www.skincancer.org/prevention/sun-protection/clothing). 3rd tremendous controversy re cell phone vs brain: http://www.cdc.gov/nceh/radiation/cell_phones._FAQ.html & http://goo.gl/pXC9IQ (Mayo Clinic).
Answered 9/1/2015
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