Samsung Pay is on a roll. After launching in South Korea and the US in 2015, it has expanded to China in 2016, started a trial in Singapore last week, and now it's deploying in its first European market: Spain.

And Samsung Pay is starting with a big advantage in Spain: it's the first mobile payment service to be offered in the country [Edit: Samsung said it's "the first of its kind," which apparently doesn't mean it's the absolute first. As readers pointed out, several mobile contactless payment solutions already exist in Spain], giving it a huge lead and potential for growth, especially considering the penetration of debit and credit cards among the country's working age population.

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