When I first setup my M8 I add my google account which adds my google contacts into my phonebook. I also add a facebook account which adds my facebook contacts to my phonebook. after a while the phone suggests to link all my duplicate contacts which I do. I notice there is also a "merge" in the phonebook settings menu. I am wondering what the difference is between linking and merging contacts. there is clearly two seperate settings in the phonebooks settings menu. just as a note, i have never had anything come up in the "merge" menu, but my google/facebook duplicates come up and i automatically link under the "link" menu.

 

thats what linking does. i have mom's phone number in my contacts and i have mom on facebook, it will link those two together.