facebook records ip of account u created they locked it when u sign in from some where else they ask birthday to unlock it
when u create account leave its search visiblty and birtday info open when u get locked search that id from another account check birthday info and enter it ur account will be unlocked
when u create account leave its search visiblty and birtday info open when u get locked search that id from another account check birthday info and enter it ur account will be unlocked