Nokia 2605 Manual page 33

Do wireless phone accessories that claim to shield the head from
RF radiation work?
Since there are no known risks from exposure to RF emissions from wireless
phones, there is no reason to believe that accessories that 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 "hand-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. In February
2002, the Federal trade Commission (FTC) charged two companies that sold
devices that claimed to protect wireless phone users from radiation with
making false and unsubstantiated claims. According to FTC, these
defendants lacked a reasonable basis to substantiate their claim.
How does FCC Audit Cell Phone RF?
After FCC grants permission for a particular cellular telephone to be marketed,
FCC will occasionally conduct "post-grant" testing to determine whether
production versions of the phone are being produced to conform with FCC
regulatory requirements. The manufacturer of a cell phone that does not
meet FCC's regulatory requirements may be required to remove the cell
phone from use and to refund the purchase price or provide a replacement
phone, and may be subject to civil or criminal penalties. In addition, if the cell
phone presents a risk of injury to the user, FDA may also take regulatory
action. The most important post-grant test, from a consumer's perspective,
is testing of the RF emissions of the phone. FCC measures the Specific
Absorption Rate (SAR) of the phone, following a very rigorous testing
protocol. As is true for nearly any scientific measurement, there is a
possibility that the test measurement may be less than or greater than the
actual RF emitted by the phone. This difference between the RF test
measurement and actual RF emission is because test measurements are
limited by instrument accuracy, because test measurement and actual use
environments are different, and other variable factors. This inherent
variability is known as "measurement uncertainty." When FCC conducts
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