To remove your Facebook account from all of your devices, you’ll need to delete the app on each device. You can also use the browser on your mobile device to go to https://m.facebook.com/settings/?tab=privacy&content_type=all and then tap “Delete.
In order to delete your Facebook account from someone else’s phone, you must first log out of the app on your own device. Once logged out, go to the settings on the other person’s device and delete the Facebook app.
To view which devices Facebook is logged into, go to the account settings page and click on “Security”. This will show you a list of devices that have logged into your account.
To see what devices Facebook is logged into, go to settings and click on “Apps.” This will show the list of apps that are currently logged in.
Yes, Facebook does notify users when they login from a different device. This is to help you stay connected with your friends and family on the go.
I am not sure what is going on with your Facebook account. I would recommend you log out and log back in to see if that fixes the issue.
