Note that this little trick will delete all data that your Messenger application had saved: so it will be returned to a freshly installed state.

Pro tip: If someone else wants to use your smartphone to check their Facebook messages while you're still logged in, they just need to select Switch Account to sign into their own account. Now when you return to launch Messenger in your app drawer, you should see that it will not automatically log you in. There also should be a Clear Cache option, which we suggest you select as well.Close the app if you have it open, and remove it from your recent apps list. Otherwise, this trick won’t work.To log out of Facebook Messenger, you need to go into the Settings of your Android device. Clear Messenger app data in Settings (For Android users only) Pro tip: The steps above can also be applied to Messenger Lite.

The menus for iPhones are slightly different but follow similar steps.

Under the Where you're logged in section, tap on ⋮ button next to the entry showing the 'Messenger' option.

Scroll down and choose Security and login.

In the social media app, follow these steps to log out of the Messenger application: If you've got Messenger on your smartphone, chances are pretty high that you also have the Facebook app installed as well. Log out of the Messenger session from the Facebook app (Android and iOS users) Let us now take a look at each of these steps. The first procedure works on both iPhone and Android phones, while the second is only available for the Android Messenger app. There are two methods of logging out of the Facebook Messenger app: Log out of the Messenger session from the Facebook app or clear Facebook Messenger app data from within your device Settings. How to log out of Messenger on Android and iOS

How to log out of the Messenger app from the Facebook website.

How to log out of Facebook Messenger on iOS.

How to log out of Facebook Messenger on Android.

Open messenger account