Android 8.0 Oreo was released in August 2017, and as anticipated, it took Samsung two months just to start an official beta program for the Galaxy S8 and the Galaxy S8+. Both the 2017 flagships received their Oreo updates only yesterday, but that's how it's always been with Samsung devices. We know for a fact that last year's Galaxy S7 Edge is confirmed to receive an Oreo update, as a user from Vietnam received it on his device a few days ago.
Samsung’s 2015 flagship smartphones such as the Galaxy S6, Galaxy S6 Edge, Galaxy S6 Edge Plus, and the Galaxy Note 5 are powered by the Exynos 7420 system-on-chip and are perfectly capable of running Android Oreo. However, some of these phones are more than two-and-a-half years old, which has led some to guess that the company would not roll out the Oreo update for them. To add to the confusion, Samsung hasn’t published an official statement detailing the list of devices due to receive the Android Oreo update.
It can be said with certainty that flagship devices will receive a significant OS update at least once in their life cycle, but the same doesn't apply to older and non-flagship devices. So it came as a genuine surprise when we found out that some two-year-old Samsung devices may still receive what seems to be like their final major OS upgrade.
Due to lack of communication from Samsung on the subject, a Reddit user had to engage in some digging around in the T-mobile support forum, which revealed that the T-mobile is working with Samsung to deliver a major OS upgrade for the Galaxy S6, Galaxy S6 Edge, Galaxy S6 Edge Plus, and the Galaxy Note 5. It can only mean Oreo, considering that they all run Nougat. We're still left with a few questions though. Will all the devices receive the Oreo update or just the T-mobile variants? We don't know yet.
One thing we can say with certainty is that they'll very likely be the last in the queue to receive the updates. A full-scale Oreo rollout for Samsung has begun just now, and we can safely assume that Samsung will be busy at work rolling it out for newer devices.
Nonetheless, even if they receive Oreo a few months down the line, it is still a win-win for users, as they'll have received almost three years of software support; a first for Samsung devices.
News Source: XDA developers