Step 1: Add Extention Chrome - https://chrome.google.com/webstore/detail/user-agent-switcher-and-m/bhchdcejhohfmigjafbampogmaanbfkg
Step 2: Looking User Agent - https://whatmyuseragent.com/brand/sa/samsung and use.
Step 3: Connect IP United Kingdom then go to - https://www.samsung.com/uk/boost/
Step 4: Enjoy!
PS: OR use Bluestacks with IP United Kingdom.