https://www.cnet.com/news/phones-used-by-verizon-at-t-t-mobile-sprint-filled-with-vulnerabilities-say-researchers/ > Major US cell phone carriers may have a major problem. > Researchers funded by the Department of Homeland Security discovered security vulnerabilities in mobile devices used by Verizon, AT&T, T-Mobile, Sprint and more, DHS program manager Vincent Sritapan told Fifth Domain at the Black Hat security conference in Las Vegas Tuesday.