Are your calls being intercepted? 17 fake cell towers discovered in one month

http://www.computerworld.com/article/2600348/mobile-security/are-your-calls-being-intercepted-17-fake-cell-towers-discovered-in-one-month.html

CryptoPhone users found 17 fake “cell towers” in a month, but don’t know who deployed them or why. If you think you'd know if your calls are being intercepted by seeing the phone connect to "2G," then think again.