I'm fed up with AT&T and thinking about selling it and getting the international unlocked version. Anyone know if it works property on AT&T and if it's on MM?
Yes, the international edition (N-920i) works well on AT&T -- that is what I use.
However, there are many baseband version of the N-920i and only about 4-5 of them have been updated to MM. Still waiting on Samsung to release the others.