If you recall a few days ago, someone in Vietnam accidentally received an Android Oreo update to their Galaxy S7 edge, complete with the same Samsung Experience 9.0 that is already rolling out to the Galaxy S8 and S8+. Well, it turns out that more than one person got that same update in Vietnam, and one of them offered a system and kernel dump so that a flashable ROM could be made for folks with the Exynos-powered S7 edge with an unlocked bootloader. Thanks to this dump of information, a member of XDA-Developers was able to quickly compile a functional ROM that is based off of the...
Source: https://www.gsmarena.com/android_oreo_rom_unofficially_ported_to_the_galaxy_s7_edge-news-29591.php