Mobile phones, whether GSM or PCS type, emit microwaves during transmission. Highest energy output comes during the first several seconds. Yet, in moderate to large doses, its thermal effect can be substantial, as in the case of microwave cookers. Unlike background EMF generated by power lines, cellular antennae at roof tops, etc, the area of exposure for mobile phone is constant. EMF penetrates skull easily.
Most people use the same side and press against the same spot over the pina.
Heavy users may have exposures up to three hours a day. Public concern, whether out of self awareness or led by the media, are not without ground. These data also suggest that the effects can accumulate with repeated exposure. Such an event could challenge the repair mechanism and may lead to carcinogenesis. Such response includes changes in opiate, benzodiazepine and acetylcholine neurotransmitters.