The secret phone system broken up by National Crime Agency

https://www.bbc.co.uk/news/uk-53265733

How Many Millions of Cellphones Are Police Watching?

http://bit.ly/1mYCGm0

6 Possible Signs Your Cell Phone May Be Tapped

http://www.makeuseof.com/tag/6-signs-cell-phone-tapped/

How to Tell if Your Phone Is Tapped

http://m.wikihow.com/Tell-if-Your-Phone-Is-Tapped

Big Brother is listening – on your phone

http://bit.ly/1Rjt8wY

Big Brother Is Listening to Your Cell Phone Calls

http://m.huffpost.com/us/entry/71731