You can easily unblock someone on Facebook Messenger in the "People" preferences section of the app. Here's how to do it.
The only way to deactivate Messenger is to deactivate your Facebook account, but you can also disable Messenger by turning ...
If you want to recover a text message, tap on the thread or message so that it's selected, hit Recover on the bottom right, and then tap Recover Message in the pop-up that appears. You can also ...