Are you linked to the web? Haha, seriously though, are you?
Assuming you have the best login email and password (and also you're connected to the web) there's a couple of things that may be causing your troubles:
Cannot Log In Facebook
Are you obtaining an error message? If so, inspect the Facebook help page for explanations and fixes to known issues.
See to it you don't have any kind of extensions or antivirus programs running that are blocking Facebook.
Have you tried getting rid of the app's cache? Go to Settings > Apps > Facebook > Clear Cache. If this does not work you can attempt clearing data also and also as a last option uninstalling and also re-installing the application completely.
Did you sign up with your contact number? Make sure you key in the nation code as well when logging in.
If the app is informing you to upgrade your email address, this is more than likely since your email server is identifying your Facebook emails as spam.
If you have actually lately enrolled in Facebook you could require to confirm your account initially. If you have actually recently transformed your password, make certain you're attempting to log in with the brand-new password as well as not the old one.
If you're logging in using a web browser, ensure you have cookies made it possible for and that facebook.com is included in your list of safe sites.
Make sure you have the most current variation of the Facebook app for Android.