Why there is no system update settings in my s7 SM-G930F

[Ernest Nyarko]

I bought Galaxy s7 with the model number SM-G930F UAE and wanted to update it to android nougat because it's running on marshmallows but to my surprise there is no system update settings for my phone meaning I can't update my phone over the air, I have try my best to see the update settings but nothing seems to work and stuck on android 6.0.1 whiles every one is moving on to nougat with no issue?, or can I update to nougat firmware using odin?, if yes then is it only the model number that i will have us to get the firmware, what about region and area cause mine is made in Vietnam but shows United Arab Emirates and am also in Africa