Are you attached to the internet? Haha, seriously though, are you?
Assuming you have the ideal login e-mail and password (as well as you're connected to the net) there's a few things that might be triggering your problems:
Unable To Log In Facebook
Are you getting a mistake message? If so, inspect the Facebook help page for descriptions as well as fixes to well-known concerns.
Make certain you don't have any type of extensions or antivirus programs running that are blocking Facebook.
Have you tried clearing the application's cache? Go to Settings > Apps > Facebook > Clear Cache. If this doesn't work you can attempt clearing information also and also as a last hope uninstalling and also re-installing the application totally.
Did you sign up with your contact number? Make sure you key in the nation code also when logging in.
If the app is telling you to update your e-mail address, this is probably because your e-mail server is identifying your Facebook emails as spam.
If you have actually just recently registered for Facebook you may need to validate your account first. If you've just recently changed your password, make certain you're attempting to log in with the new password and also not the old one.
If you're visiting via a browser, make certain you have cookies allowed and that facebook.com is included in your listing of risk-free sites.
Make sure you have the most current variation of the Facebook app for Android.