Why does a person who constantly appears in my facebook friends list on my pc not a appear in my?

... facebook friends on my mobile? or:... facebook friends on my mobile?or:Probably because you don't have them as a friend.or:well sometimes there

... facebook friends on my mobile?

or:... facebook friends on my mobile?

or:Probably because you don't have them as a friend.

or:well sometimes there is a certain application or features that is available in pc but not in phone because of its limited screen or other properties

Tags:pc,