can't hear as well. that's in fact, what we learned, the worst time to be doing that, and here's why. your phone is not always giving off the same amount of radiation. if you have a poor signal, if you're having a hard time hearing the person, in fact your phone is trying to compensate for that. your phone is trying to give you a better signal, and in the process of doing that it is emitting even perhaps more radiation. this is a constant process. it's constantly communicating with cell towers. further away from a cell tower, the sort of remote region that you're in, it could actually be exceeding those fcc limits as far as radiation goes, trying to give you a better signal. >> and you've always used a wired earpiece when talking on the phone. is that radiation-free? >> well, you know, it's interesting. it's not radiation-free. and again, this has been a learning experience i think for a lot of people. but even the wired earpiece,