Mobile Radiation. Is it a REAL DANGER?

You have heard all the stories out there and you surely heard about the World Health Organization making statements that using Mobile Devices are POSSIBLY a cancer risk.  My goodness I have been using a cell phone for more than 15 years.  Just think about all of us using these devices.  It will be very hard for me and I am sure you to leave the cell phone at home or not use it.  They are the life lines to or families, friends and businesses.  There must be another way to handle this situation.  Guess what, I found it!  There are many companies out there who are manufacturing Mobile Radiation Blockers.  Some are really expensive and I mean beyond $100.00 USD.  Then their some companies which are way cheaper but still not cheap, like around 37.00 USD.  I am looking or something cheaper.  Does anyone know of someone who can make cheap and high quality Mobile Radiation Blockers?