"Beware of Regin, the master! His heart is poisoned. He would be thy bane..."
more here.......http://securelist.com/blog/research/67741/regin-nation-state-ownage-of-gsm-networks/
more here.......http://securelist.com/blog/research/67741/regin-nation-state-ownage-of-gsm-networks/