When you pick a photo out of gallery and you click share and a box pops up with options like messaging, facebook , twitter gmail etc. Well my phone does that but my wifes does not show Facebook and we dont know why. Mine shows facebook plus another one Facebook for LG. Any ideas on why my wifes dont have Facebook option for share??
Try a device wipe and see if that resolve your issue.
P.S. make sure that you back your information up and check the gmail account or back up assistant for the contacts.