If you buy direct from Samsung, you have a factory unlocked phone and should already have nougat. If you bought a phone from one of the big 4 carriers and had it unlocked, you are still depending on that carrier to release the update to your phone as each carrier has a different model phone. Verizon was part of the beta program for nougat though, and I know there were some problems, but from what I've read, most users were very happy with the update, so I don't understand this delay. Of the big 4 carriers though, they are last to release.