Why I can't log in my main Facebook account in my mobile phone iPhone 4S?

Why I can't log in my main Facebook account in my mobile phone iPhone 4S?

Probably because you haven't enabled your Facebook account to accept log-ins from unapproved devices. Facebook records the IP address where your account originates from and if you log into Facebook with a device that has a different MAC address and a different IP than the one you used to access the account previously then they will reject the login.

If either your MAC or IP address match, then Facebook will accept the login even if you haven't enabled login from foreign devices. If neither your MAC or IP address match then Facebook will only accept the login if you've approved login from foreign devices.

Help, why can't I log into Facebook on my phone, this has never happened before?

  • Why won't my iPhone log into the facebook app? I press 'continue' to log in and the little white loading circle comes up and stays there forever. I don't understand why I can't log into facebook on my phone bt it's really starting to cheese me off. I've deleted and redownloaded the app twice now, can anyone help me out with this?
  • Why can't I log into my meetme account? Today I had my iPhone reset at the apple store and now when I downloaded meetme app it won't let me login and when I try entering my email to forgot account it says it doesn't exist. My accounts still there because my friends see it, what's going on?
  • I admin a page on facebook. But i can't log into it from my iphone? It will just Load. If i put in the wrong password it will tell me. Right password it will just stay on the loading screen.
  • How to completely log out of my Facebook account on my iPhone? Now when I click on the Facebook icon after I have logged out the page opens and says "Logged in as ___. Continue (which if I tap this button it automatically logs me - or anyone else! - into my Facebook account) and then below this in parentheses it says "not you?" I want to log out so that when I open the Facebook app I have to completely log in from scratch. Input my email and password manually.