What is a safe distance to live away from a mobile phone mast?

You are safer right under the mast than you are holding a cell phone to your ear. Cell phone towers are low (100W) power and the effect drops off dramatically even with a slight distance. Cell phones on the other hand are .6 to 3 watts and are right next to your brain. Nothing conclusive has been proven one way or another on any adverse effects. It does disturb me when I see parents holding a handset next to a baby's ear. These are the same microwave frequencies that you cook your food with!