On Wed, 18 Dec 2013 18:34:53 -0700, wrote:

I have an old Razor that has no headphone (headset) jack. The only jack
is the small sort of triangular one that the charger plugs into. The ATT
people want to sell me a Bluetooth not getting the idea the the reason I
want a headset in the first place is to get the damn RF away from my
head. They really don't know or care much about helping a guy with an 8
year old phone, I get that. So I'm hoping that the group can help. Does
this charger port also serve as an audio port as well? Is there a
headset available that would work with my phone? I don't relish the
thought of continually microwaving my brain every time I have to use
this damn thing. Thanks, Lenny

First, 'radiation' from a cell-phone is high frequency, on the order of
900MHz at 1W peak transmitting power trying to 'wake' up a tower.
Second, 'radiation' from bluetooth is higher frequency, on the order of
2.45GHz [exactly like your microwave oven] at what? 100mW?

Next, your body is a giant sal****er bag and is conductive to these
frequencies, it's like having a metal shield around your body. The ability
for high frequencies to penetrate your body is extremely small. The
telephone frequency is less than 1% within half inch, depending on just
how conductive you are, could be as low as 0.1% For Bluetooth it's down
to less than 1% at 1/3 inch.

So, starting out with lower power, means you get to lower power sooner,
thus Bluetooth would be preferential for lowering your exposure.

And worse, there is some evidence that hardwire headsets intended to
reduce exposure by moving the phone away from the head can actually
increase exposure by creating an 'extra' gnd [transmission line] a
standing wave along the wires if you will that actually inserts the power
right into your ear. Doesn't seem prudent to me.

All in all, if you're concerned with exposure to RF getting into your
body, I'd lean toward the Bluetooth wireless headset and keep the phone on
the dahsboard, or on top the desk.