I just bought an S8 unlocked in the UK and I have always been using Android Pay on my old phone and it does work on the S8, but I want to try and use Samsung Pay. The problem I am having is that I can install it on the Google Play store and not the Galaxy App store it will just throw errors. And If I install it from Google page store and launch the app it will just be stuck on the "Hello, Welcome to Samsung Pay" page and no way to continue with the setup process. Is it not suported?