Two possibilities, assuming the internet access is aright with it. It's a carrier version Note8, and do you have service and a SIM with that carrier? Or possibly it's a grey import device, and it's not in the region or country that Samusng intended to be sold and used in. These are often sold from third-party Amazon or Ebay vendors, and described as things like "international unlocked", but it might actually be a Hong Kong or a Saudi Arabia version or something.