Mobile Phone and Transmission Towers like, mobile phone towers, broadcasting towers, overhead power lines and radars constantly emit hazardous Electro-Magnetic Radiations (EMR). This Radiation penetrates your head and the level of penetration depends on how close is your head to the source of the EMR emitted from mobile phone. The studies suggest that the EMR can destructively affect the sensitive tissues and delicate organs in the ear, eye, brain etc.
In the ear, a tumor may develop on the auditory nerve, especially on the side where mobile is mostly kept while talking.