My phone (note 8 ) didn't have full fledged android pie features like digital wellbeing and all that are there in one ui 1.5.Will this gets that update?

Does note 8 supports Wi-Fi calling feature?

I have a samsung watch which i purchased with my note 9. But the samsung pay does not show up in the galaxy watch as well as in the galaxy wearables app.  I'm in India. Is there any such restriction or something.  Please help.  

Note 4 needs latest Samsung UI because there is no UI changes from lollipop to marshmallow upgrade which is very disappointing. Please take this as consideration and provide at least note 5 marshmallow interface to note 4.

I have updated my s6 mobile to nougat but I didn't find any samsung pay app in built? Will s6 support samsung pay?