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ensure that the device operates at a minimum power level
required to be connected with network.
Although SAR values might vary for different models of
phones or even for different positions of the same model,
they are all compliant with regulations pertaining to safe
level of radiation.
According to WHO current research, there is no need to
apply any special restrictions in using portable devices.
According to WHO, in order to reduce radiation, a length of
conversation should be reduced, or headset or
speakerphone should be used, or the phone should not be
held in proximity to head or body.
SAR values might also vary due to various reporting and
testing requirements in different countries as well as to
different frequencies in a certain network.