Encrypting a conversation is optional because end-to-end encryption breaks some features in Messenger, like using it across multiple devices, archiving past conversations, and even sending things like money or animated GIFs.

If you're looking to share information that you don't want falling into the wrong hands, start a Secret Conversation, which uses the Signal Protocol to set up end-to-end encryption.

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Same with the camera, it needs access if you want to send your friends pictures. But it requires that access because the microphone is needed for voice calling, a service that the standalone app offers that the Facebook app doesn't, and sending sound with videos. Reality: The app needs permission to use your phone's microphone and camera. Myth: Facebook's Messenger app will use your phone's microphone to record you. You can view the app's list of permissions here. On the iPhone, users don't get the list of permissions when they install the app, but when they use it, permissions pop up individually.

But it's the same data most messaging apps have access to. It's a long list with 10 items, each of which states that the app needs access to features on your phone including contacts, calendar, location data and Wi-Fi information. What's upsetting people is the list of 'permissions' they see when they download and install the app on an Android phone. Reality: Facebook's terms of service are the same for all its mobile apps, including the main Facebook app. Myth: The Facebook Messenger app's terms of service are different from -and more intrusive than- Facebook's own official terms.

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