Cellphones and Cancer

I am sure cell phones cause cancer because of all the radiation that they give off. Not only that, you are putting it right next to your head. At the same time, I also kind of don't care. This day in age, EVERYTHING can give you cancer. If I live my life living in fear of getting cancer, then I just might die because of the high blood pressure I have that is caused from it. Cell phones have become a way of life. I think the cell phone manufacturers should come up with a way to make cell phones that don't give off radiation.