Are you linked to the net? Haha, seriously however, are you?
Assuming you have the right login email and also password (and you're linked to the web) there's a few things that might be causing your issues:
Facebook App Wont Login
Are you getting an error message? If so, check the Facebook help page for explanations and fixes to known concerns.
See to it you do not have any type of expansions or antivirus programs running that are obstructing Facebook.
Have you tried clearing the app's cache? Go to Settings > Applications > Facebook > Clear Cache. If this does not function you can try clearing up information also and also as a last resort uninstalling and re-installing the app entirely.
Did you join your contact number? See to it you key in the country code also when visiting.
If the app is telling you to upgrade your email address, this is most likely since your e-mail web server is identifying your Facebook e-mails as spam.
If you've recently signed up for Facebook you could need to confirm your account first. If you've lately altered your password, make certain you're attempting to log in with the new password as well as not the old one.
If you're visiting by means of a browser, make certain you have cookies allowed which facebook.com is contributed to your checklist of safe sites.
Ensure you have the most current variation of the Facebook app for Android.
