The EWG studied over , cell phone sold in the US and rank the top best low radiation and worst high radiation cell phones. EWG의 휴대폰 방사선 데이터베이스를 검색하여 자신의 휴대폰이 어떤 등급인지 확인할 수 있습니다. What about the little chip that promised to diffuse radiation away from your head?