Recent study claims that consistent cellphone use may harm its users, most especially men, and it may lead to serious cases like getting cancer.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/cellphone-use-can-lead-brain-cancer-men
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/science-world-report
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health
[4] http://admin.indiaenvironmentportal.org.in/thesaurus/mobile-phone
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/radiation
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/brain-cancer