People who used their phones more than 15 hours each month found to be at two to three times higher risk of developing glioma and meningioma tumours… The study, appearing in the latest issue of British journal Occupational and Environmental Medicine, is the latest in a long-running exploration of mobile-phone safety… In 2011 the International Agency for Research on Cancer (IARC) said radiofrequency fields used by mobile phones were possibly carcinogenic.
Read more: http://www.theguardian.com/society/2014/may/13/intensive-mobile-phone-users-higher-risk-brain-cancer-study