[citation][nom]nekatreven[/nom]So let me get this straight...they aren't sure if the current cell frequencies (most are a few hundred megahertz from 1ghz) are harmful or not, so their suggestion is to use a wireless headset running in the 2.4 band!? The same frequency range that your microwave uses to boil water!?[/citation]
Microwave power is usually measured in hundreds to over a thousand watts, and confined inside an area of a square foot or so. Cellphones transmit with about .25 watts, outwards in all directions instead of focused onto a small space. It's pretty much impossible to microwave your tissue with cellphones unless you can, like the inside of a microwave, concentrate all the output of a few thousand of them in one spot right next to your skin. Keep in mind also that the power of the waves drops off with the inverse-square rule, so cellphone signals from a few tens of yards away are already significantly weaker than one right next to you, so it really doesn't matter how many people in your town are using them either.
Low power levels or not, that is some well-penetrating crap.
And it doesn't carry enough power to do anything significant. At most it could heat up the patch of skin on your head about as much as a few square centimeters exposed to sunlight, or basically a tiny part of your face. Even for pasty, transparent-skinned tech geeks like us, that's not really cause for alarm and it isn't going to cook you. ;P
As to studies, there have been decades of studies for this and similar issues that have generally been inconclusive, and in some cases poor design (i.e. lack of blind trials in the Israeli study they mention) can muck up the strength of the conclusions. Cell phones can't cause cancer in the traditional way, because the RF frequencies are not ionizing radiation and so do not break your DNA. From what I'm reading this Telegraph article is based on preliminary conclusions and the study hasn't been analyzed well enough for an official conclusion.
[citation][nom]bogcotton[/nom]It is the electromagnetic radiation cell phones use to transmit their information wirelessly. Pay phones are usually connection to the telephone grid, so wont do anything, except maybe give you an ear infection or sickness due to how horrendously filthy they are. Some/ most housephones are wireless now, so they also use radio or microwave frequencies, although of a much lower intensity.[/citation]
Intensity doesn't matter, really, what matters is frequency. Red light, no matter how intense, will never be ionizing radiation. UV light, no matter how scarce, will always be ionizing.