Galaxy S6, S6 Galaxy Edge, Galaxy S6 Edge + and Galaxy Note 5. That’s the brand with Samsung by its absolute high end in 2015. They are the most pampered brand phones this year and, as such, will receive the news of software before any other.
In addition to share much of the internal hardware (especially for couples), so there shouldn’t be too many problems to adapt Android 6.0 Marshmallow between them without too much effort. And it is possible that they are in this.
At least so it says SamMobile, that usually have good hand with the firmware previously to its output (and also after). They handled an update to version G925FXXU2COH2 to the G925FXXU3COI6, where the transition from U2 to U3 (in bold) would mean a significant update in the user interface.
That doesn’t involve, of course, that we are talking about the latest announced Android (Android M will be made official with the next Nexus on September 29. It may be an updated version of the layer of customization that Samsung applied on these phones, currently in Android 5.1.1.
Upgrade to 6.0 Android device list is, of course, expected but this is clearly the selection of priority terminals, and already have some work of Samsung, almost ready to see the light. What remains for many a good news.