So, I bought an international S7 Edge in Singapore last year. Got to say that their updates are incredibly slow.....only recently got the November Security update.
Had an on-line chat with them just now, about when to expect the Nougat update.......April to June!!! Though he did helpfully add "this year".
It really makes me sad that Samsung promise to update phones, then we have to wait maybe half a year to actually get the update.