Cell Phone Brain Cancer ?

Dear Teaming Millions, will using a cell phone significantly increase my chances of getting a brain tumor or some sort of other horrible disease later in life? I have looked around on the web trying to answer this one myself, and have found mixed results. Seems like there are a lot of different opinions floating around out there, and the cell phone companies themselves are unwilling to completely vouch for their safety. My friends cell phone even states that it must be help 1.75 inches away from himself at all times to avoid possible side effects. “Yeah right”, you NEED to put the phone up to your ear to use it. Anyway I was hoping you could sort through some of the confusion.

Cosmos