Open the Messenger app
Tap your profile picture
Tap Account settings
Tap Password and security
Tap Where you’re logged in
Select the Messenger session
Tap Log out
If you use Facebook...
Open Messenger
Tap your profile picture
Tap Privacy and safety
Tap Blocked accounts
Find the person you want to unblock
Tap their name
Tap Unblock on Messenger
Confirm the unblock action
