I know how to upgrade to Nougat 7.1 via using a micro USB boot ROM, but I don't think your phone supports it though, feel free to give it a shot regardless if you want.
http/wccftech.com/update-galaxy-s6-to-android-7-1-1/
I know how to upgrade to Nougat 7.1 via using a micro USB boot ROM, but I don't think your phone supports it though, feel free to give it a shot regardless if you want.
http/wccftech.com/update-galaxy-s6-to-android-7-1-1/