How do I deactivate Messenger?

Keep in mind that you have to deactivate your Facebook account in order to see the option to deactivate your Messenger account.
To deactivate Messenger after you've deactivated your Facebook account:
iPhone, iPad and Android:
  1. From Chats, tap your profile picture in the top left corner.
  2. Tap Legal & Policies.
  3. Tap Deactivate Messenger.
  4. Tap Deactivate.
To reactivate Messenger, log in with your username and password.
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