Facebook Messenger is a great app, but there was some initial concern that Facebook was using the app to listen to your conversations. Facebook’s response is a great example of how to handle a public misconception. I wanted to document it.
You might have heard the rumors going around about the Messenger app. Some have claimed that the app is always using your phone’s camera and microphone to see and hear what you’re doing. These reports aren’t true, and many have been corrected. Still, we want to address some concerns you might have.
Source: Get the Facts About Messenger