By the way, if I can say just one thing that you may be grateful for, people don't realize that the cellphone, in order to operate, has to know where you are all the time, so it is constantly in contact with the tower, which means that it's sending out signals. You don't realize that when you're carrying it.
It's easy enough to shut it off, and then, when you want to know what messages have come in, to turn it on and listen to it. Don't keep it on all the time, because you're getting irradiated.