Question: Unable to sign into Facebook account.
Tried to sign into my Facebook account, but the program keeps asking for my account user name or phone number, then repeats this over and over.
Go to: Settings icon / Safari / go down to Privacy/ Securities / Block Cookies / Then select Allow From Current Website Only. Verify by signing in. This is my first post. Hope this helps.
iPhone 6s, iOS 11.0.3, Facebook signin problems