Samsung is committed to staying true to its promise for monthly security updates, uttered all the way back in August. It's getting progressively harder to keep track which device gets what when, but the Galaxy S6 edge+ and Galaxy S6 are now receiving their share of added security, this time in India and the Nordic countries. The patches come as OTA updates weighing in at or below 100MB. If you're not among the lucky ones, getting the OTA, however, and you own an SM-G928F version of the Galaxy S6 edge+, you can also download the full firmware and flash it manually. The US versions of the smartphones, along with the other members of Samsung's current-gen flagship family Galaxy S6 edge, and Note5 got a December update a couple of weeks ago. As with all such releases, keep in mind that firmware update timeframes vary by region, so just because you're not getting it today, doesn't mean it's not coming to...
Source: http://www.gsmarena.com/samsung_galaxy_s6_edge_receives_december_security_update-news-15742.php