You don't need to shout into a cellphone.

People think that, because they're far away from the folks they're gabbing with on the cell phone that they have to shout. You don't need to! In fact, you can pretty much whisper and the other person will hear you. I have a friend who will talk with people on his stupid cell phone while he's in the car with me or dining with me --- and I don't even know he's doing. He's turned talking quietly into an art form.