Thanks for all the replies! I live on my phone to work.I mean if just use it occasionally,I would not worry about it at all. But I do use it terribly, sometimes 4 to 5 hours a day in total.Answer phone call,text,reply emails and so on.When I got home,I lay in bed and surf the Internet as well. If the radiation is really harmful, I could not imagine. Really hope as you ladies said, everything will be fine.