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But as we mentioned earlier, the application 'remembers' your Facebook account. 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.
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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.
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