Other tips for reducing exposure to radio frequency energy from cellphones: Keeping the phone away from the body, reducing cellphone use when the signal is weak, reducing the use of cellphones to stream audio or video or to download or upload large files, keeping the phone away from the bed at night, removing headsets when not on a call, and avoiding products that claim to block radio frequency energy because they may actually increase your exposure...."
http://www.fresnobee.com/news/local/article189586129.html
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