Hi your s7 should update in January as this is when Samsung is going to roll out android Nougat. just keep checking for updates in your phones settings. This article has additional information about release on your device: http://www.trustedreviews.com/news/samsung-confirms-when-the-galaxy-s7-android-nougat-update-will-dr...
Hope this helps
I started thread called "Users from Galaxy Beta Programme" today. Hopefully other beta testers will join as well as I advertised it in beta programme.
So we could share our opinions about nougat for s7 ad s7 edge.
In the UK it's being rolled out in batches to open network S7/S7 edges, with other variants of that model to follow.
Unsure if you're aware, but you'll be able to check for updates through Apps > Settings > About Device, and either manually search or set it to automatic. Alternatively, if you plug it into Smart Switch, it can also look for updates.