A few months back (I procrastinated finding a solution to this issue), NFC was not working because one of the locking tabs on the backplate had broken off, and the NFC contacts on the backplate and the phone weren't coming into contact (confirmed by pushing real hard in that spot, which allowed NFC to work). I ordered a new backplate, and it fits perfect. However, the NFC still does not work, even though the contacts are clearly making contact. I don't know exactly why it isn't working, hopefully someone here can help. I do have an idea as to why it isn't working, though.
When ordering the backplate, I opted for the International Note II's backplate because I don't particularly like the AT&T logo on the back. Could be that I require different drivers for the new NFC chip?
If anyone could help, I would greatly appreciate it! If I missed any information I'll be glad to provide it.