Back in April Samsung announced the Galaxy S6 family would be taken off the monthly security update list, only the Galaxy S6 and Galaxy S6 edge+ to be brought back the very next day. Today the phones have started receiving the September 2018 security patch, which will be their last. The Galaxy Note5 will have the same fate Samsung Galaxy S6 edge+ Samsung usually promises software support for two years. All three phone have been announced in 2015, meaning they were already past that for a while. Keep in mind this applies only to the scheduled security updates - Samsung will still...
Source: https://www.gsmarena.com/samsung_galaxy_s6_edge_galaxy_note5_stop_receiving_monthly_updates-news-33112.php