I sold cell phones in 1986.  They first hit the streets back then.   They cost as much as $4,600.00 and I sold them to Senators, Hotels and many other important people with deep pockets.  Now cell phone sales reach over 800 million units per year. 

As cell phones came down in price and many people could afford them the use of the "handheld" became a health issue.  The .6 watts of power was the threshold of power a "handheld" could offer as to emit the least amount of "RF" to which could hurt us.

People, if you didn't know it RF (radio frequency) is everywhere.  It is boring through your brain right now.  Every radio transmitter out there is sending waves as you read this. Thousands of different radio waves are bouncing off your head (and body) this instant.

For a long time a strong argument has been made that cell phone radio waves (radiation) emit a strong enough wave to penetrate your skull and somehow cause brain tumors. 

And you may not simply able to get a brain tumor by holding up a cell phone to your head.   Why?  For the same reason I mentioned above, RF is everywhere.  The closer you are to any signal source the more concern you should have.  And here is more... just owning a cell phone can be cause for concern.  They are always transmitting, even when not in conversation although the transmission signal is much much weaker.  Just read this case: http://www.emf-health.com/reports-courtvictory.htm

Here is another point of fact about cell phones that has NEVER changed.   The further you are from a cell phone tower, the stronger the power behind the RF.   The phone knows it has to really work hard to reach further transmitters and this means more power emitted from the unit.   ...   more »