The process varies slightly depending on your device, but generally involves using the next to the text entry box. Mobile App (iOS/Android): Open a conversation in the Messenger app . Tap and hold the microphone icon to record.

Slide your finger away from the microphone toward the "X" or trash icon to delete the recording before sending. Desktop/PC: Open a chat on facebook.com or the Messenger desktop app.

Slide your finger up to the lock icon to record without holding the button.