Many of us have, doubtless, heard some of the controversial reports about cell phone radiation and how it may be linked to brain cancer. While many of us may have simply shrugged this off and called it, "...a bunch of lies spoken merely to get attention." Research has lately been finding that it may be more than that, and it may actually have some truth in it. In fact, here is a quote frome the iPhone 3gs users manual.
(Phone’s SAR measurement may exceed the FCC exposure guidelines for
body-worn operation if positioned less than 15 mm (5/8 inch) from the
body (e.g. when carrying iPhone in your pocket). For optimal mobile device
performance and to be sure that human exposure to RF energy does not
exceed the FCC, IC, and European Union guidelines, always follow these
instructions and precautions: When on a call using the built-in audio receiver
in iPhone, hold iPhone with the dock connector pointed down toward your
shoulder to increase separation from the antenna. When using iPhone near
your body for voice calls or for wireless data transmission over a cellular
network, keep iPhone at least 15 mm (5/8 inch) away from the body, and only
use carrying cases, belt clips, or holders that do not have metal parts and that
maintain at least 15 mm (5/8 inch) separation between iPhone and the body.)
Please remember that this is simply a word of caution and the best thing you can do is simply to try to limit your exposure. This may include simple things like making land line calls when you can,and notcarrying it around wherever you go.