Samsung SCH-R640 User Manual (user Manual) (ver.f3) (English) - Page 201

products generally do not work as advertised. Unlike hands-free

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comfort. They are also required by law in many states if you want to use your phone while driving. Cell Phone Accessories that Claim to Shield the Head from RF Radiation Because there are no known risks from exposure to RF emissions from cell phones, there is no reason to believe that accessories which claim to shield the head from those emissions reduce risks. Some products that claim to shield the user from RF absorption use special phone cases, while others involve nothing more than a metallic accessory attached to the phone. Studies have shown that these products generally do not work as advertised. Unlike "hands-free" kits, these so-called "shields" may interfere with proper operation of the phone. The phone may be forced to boost its power to compensate, leading to an increase in RF absorption. Health and Safety Information 196

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Health and Safety Information
196
comfort. They are also required by law in many states if you want to
use your phone while driving.
Cell Phone Accessories that Claim to Shield the Head from
RF Radiation
Because there are no known risks from exposure to RF emissions
from cell phones, there is no reason to believe that accessories which
claim to shield the head from those emissions reduce risks. Some
products that claim to shield the user from RF absorption use special
phone cases, while others involve nothing more than a metallic
accessory attached to the phone. Studies have shown that these
products generally do not work as advertised. Unlike “hands-free”
kits, these so-called “shields” may interfere with proper operation of
the phone. The phone may be forced to boost its power to
compensate, leading to an increase in RF absorption.