Nokia Verizon Lumia 822 User Manual

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Nokia Lumia 822: Safety and WarrantyChapter 16in 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 ismounted against the waist or other part of the body during use, thenthat part of the body will absorb more RF energy. Wireless phones mar-keted in the U.S. are required to meet safety requirements regardlessof whether they are used against the head or against the body. Eitherconfiguration should result in compliance with the safety limit.Do wireless phone accessories that claim to shield thehead from RF radiation work?Since there are no known risks from exposure to RF emissions fromwireless phones, there is no reason to believe that accessories thatclaim to shield the head from those emissions reduce risks. Some prod-ucts that claim to shield the user from RF absorption use special phonecases, while others involve nothing more than a metallic accessoryattached 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 phonemay be forced to boost its power to compensate, leading to an increasein 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 unsubstantiatedclaims. According to FTC, these defendants lacked a reasonable basis tosubstantiate their claim.How does the FCC audit cell phone RF?After FCC grants permission for a particular cellular telephone to bemarketed, FCC will occasionally conduct “post-grant” testing to deter-mine whether production versions of the phone are being producedto conform with FCC regulatory requirements. The manufacturer of acell phone that does not meet FCC’s regulatory requirements may berequired to remove the cell phone from use and to refund the purchaseprice or provide a replacement phone, and may be subject to civil orcriminal penalties. In addition, if the cell phone presents a risk of injuryto the user, FDA may also take regulatory action. The most importantpost-grant test, from a consumer’s perspective, is testing of the RFemissions of the phone. FCC measures the Specific Absorption Rate(SAR) of the phone, following a very rigorous testing protocol. As is truefor nearly any scientific measurement, there is a possibility that the testmeasurement may be less than or greater than the actual RF emittedby the phone. This difference between the RF test measurement andactual 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 variabilityis known as “measurement uncertainty.” When FCC conducts post-grant testing of a cell phone, FCC takes into account any measurementuncertainty to determine whether regulatory action is appropriate. Thisapproach ensures that when FCC takes regulatory action, it will have asound, defensible scientific basis.FDA scientific staff reviewed the methodology used by FCC to measurecell phone RF, and agreed it is an acceptable approach, given our currentunderstanding of the risks presented by cellular phone RF emissions.RF emissions from cellular phones have not been shown to present arisk of injury to the user when the measured SAR is less than the safetylimits set by FCC (an SAR of 1.6 w/kg). Even in a case where the maxi-mum measurement uncertainty permitted by current measurementstandards was added to the maximum permissible SAR, the resultingSAR value would be well below any level known to produce an acute ef-fect. Consequently, FCC’s approach with measurement uncertainty willnot result in consumers being exposed to any known risk from the RFemitted by cellular telephones.FDA will continue to monitor studies and literature reports concerningacute effects of cell phone RF, and concerning chronic effects of long-term exposure to cellular telephone RF (that is, the risks from using acell phone for many years). If new information leads FDA to believe thata change to FCC’s measurement policy may be appropriate, FDA willcontact FCC and both agencies will work together to develop a mutuallyacceptable approach. Updated July 29, 2003Message from the CTIA (The Wireless Association)© 2006 Cellular Telecommunications & Internet Association.73