The World Health Organization has labeled cell phone use as "possibly carcinogenic to humans."
Here's a few ideas to help minimize the possible radiation!
Use a wired earpiece instead of holding your phone up to your ear every time. Anything that gets the phone a few inches away from your head helps. The bluetooth wireless earpiece help too, but it still gives off some radiation, but much less than the cell phone. You can use the speaker phone or send a text!
You can download a report from Cnet on the phones that give off the most radiation. See if your phone is one of them!