Which country first implemented nationwide mobile payment-integrated POS systems that became the standard for retail transactions, largely skipping traditional card-based payment infrastructure?

In today's globalized retail landscape, point-of-sale (POS) systems vary dramatically across different geographical regions, reflecting local needs, infrastructure capabilities, and cultural preferences. These systems have evolved uniquely in different parts of the world, with some regions pioneering innovations that later spread globally. Test your knowledge about how geography has influenced the development and implementation of POS technology around the world.

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China
Sweden
Kenya
South Korea