Message From The Ctia - Nokia Verizon Lumia 822 User Manual

Nokia Lumia 822: Safety and Warranty
in the head because the phone, which is the source of the RF emissions,
will not be placed against the head. On the other hand, if the phone is
mounted against the waist or other part of the body during use, then
that part of the body will absorb more RF energy. Wireless phones mar-
keted in the U.S. are required to meet safety requirements regardless
of whether they are used against the head or against the body. Either
configuration should result in compliance with the safety limit.
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 prod-
ucts 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 gener-
ally do not work as advertised. Unlike "handfree" 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 wire-
less 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 the 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 deter-
mine 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
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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 instru-
ment accuracy, because test measurement and actual use environ-
ments are different, and other variable factors. This inherent variability
is known as "measurement uncertainty." When FCC conducts post-
grant testing of a cell phone, FCC takes into account any measurement
uncertainty to determine whether regulatory action is appropriate. This
approach ensures that when FCC takes regulatory action, it will have a
sound, defensible scientific basis.
FDA scientific staff reviewed the methodology used by FCC to measure
cell phone RF, and agreed it is an acceptable approach, given our current
understanding of the risks presented by cellular phone RF emissions.
RF emissions from cellular phones have not been shown to present a
risk of injury to the user when the measured SAR is less than the safety
limits set by FCC (an SAR of 1.6 w/kg). Even in a case where the maxi-
mum measurement uncertainty permitted by current measurement
standards was added to the maximum permissible SAR, the resulting
SAR value would be well below any level known to produce an acute ef-
fect. Consequently, FCC's approach with measurement uncertainty will
not result in consumers being exposed to any known risk from the RF
emitted by cellular telephones.
FDA will continue to monitor studies and literature reports concerning
acute effects of cell phone RF, and concerning chronic effects of long-
term exposure to cellular telephone RF (that is, the risks from using a
cell phone for many years). If new information leads FDA to believe that
a change to FCC's measurement policy may be appropriate, FDA will
contact FCC and both agencies will work together to develop a mutually
acceptable approach. Updated July 29, 2003
Message from the CTIA (The Wireless Association)
© 2006 Cellular Telecommunications & Internet Association.
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