The truth is that there are no known health risks from mobile phones . There have been many, many studies, and some of them have shown some biological changes from some sorts of radio emission.
None look dangerous in the context of mobile phones or radio masts.
There is no sudden unexplained rash of neurological sickness, skin cancers next to the ear, exploding eyeballs, lambs being stillborn or sparrows plummeting to their deaths. There are no government guidelines about how using your phone increases the risk of X, because there is no known X. Furthermore, we have been living in a sea of electromagnetic radiation all our lives, and our parents have been living in the selfsame sea all theirs. Our houses throb with the stuff. We live in a country where you can buy cigarettes over the counter and drink yourself to a coma every night. You can drive a tin box down a motorway at enormous speed, seconds from hundreds of other tin boxes doing the same thing.