The issue of Android coming is it never gets a formally announced release date. In the case of Samsung, the upgrade of Version 6.0 (also known as Android M or just Marshmallow) came early this year, but it is possible that Version 7.0 (aka Android N or Nougat) could come earlier. This is what is known about Android Version 7.0 Nougat Release Date for Samsung S7, S6, S6 Edge, S6 Edge +, S5, Note 7, Note 5, Note 4, and Note 3.
According to iTechPost, Samsung is in the process of testing the Android Nougat update on the Galaxy S7 and S7 Edge. There is a report that the Galaxy Note 7 won't be receiving the Android Nougat update together with the S7 and S7 Edge. Samsung has apparently stated that the implementation of the custom features of Nougat may require around two to three months.
That news is pretty strange, as the Galaxy Note 7 is the most recent of the Samsung Android products. Generally, the rule of thumb for any Android update for any Android manufacturer is a first come, first serve basis. That is, the newest of the devices usually get the upgrade first.
Know Your Mobile reports that on September 23, news has been reported that Samsung will introduce the Galaxy Note 7's new Grace UX to the Galaxy S7 series when the upgrade occurs. The Grace UX will have some new features, as well as smoother performance.
So it looks like we are looking at the S7 series first, and then it will probably coming to the Samsung S6, the S6 Edge, the S6 Edge +, however, there is not any word on if it is coming to the Galaxy S5.
The news of the release date for Android Nougat on Samsung devices, both old and new, has not changed since last week. Most of the news concerning the release date of Android on Samsung and assume that the same pattern will be as last year, as the Galaxy S6 was able to get Marshmallow in Q1 of 2016. Most figure that Q1 of 2017 is when the latest version will arrive on the S7, and then slowly trickle down to the rest of the newer models after that.
I would expect the upgrade to come to Samsung devices later rather than sooner, as this is the pattern of Android rollouts. The other pattern is how some carriers receiving the upgrade first before others. This year could be different, but we will see.
As we have reported before, it seems like the Android upgrade is coming earlier. At least when it comes to Google Nexus, because it is coming to the Nexus 5X and the Nexus 6P even before Google has put out their new devices.
So, if you haven't received Marshmallow on your "newer" Samsung device like the types listed above, you should take care of that. Just check your "Settings" and "System Updates" to see if Marshmallow is ready to download OTA. This upgrade might not be ready depending on your U.S. carrier, as it has been shown that certain carriers receive the Android upgrade before others, with no real pattern. The same goes for Nougat, when it finally comes out for Samsung, which would appear to be early of next year.