An interesting article by Dennis Peng can be found in the Ooma Blog. The article talks mostly about hackers and governments listening to your cell phone and wired telephone calls. Amongst other things, the article states, “There is a backdoor built into every cell phone call. It can be accessed by intelligence agencies, hackers, or anyone with your telephone number.”
As to old-fashioned wired telephones, Peng writes, “Every day, collection systems at the National Security Agency intercept and store 1.7 billion e-mails, phone calls and other types of communications,” reports the Washington Post.
The article may be found at: http://bit.ly/2I7DY8W.