I have believed for many years that frequent use of cell phones is hazardous to a person's health.
On Sept. 9, the Environmental Working Group (EWG), a public-health advocacy, released a lengthy review of past research linking long-term or frequent cell-phone use with increased rates of brain tumors, migraines and kids' behavioral problems
http://www.time.com/time/health/article/0,8599,1925152,00.html