We’ve been focusing on the three-digit number that is your credit score. It can be from the 300s and up to 850. And it’s used to determine whether someone is worthy of being granted a loan, a credit card, even a mortgage. What happens when you don’t have access to basic banking? You may not have a credit score at all. And it’s not always easy to establish one. “Marketplace Tech” producer Jesús Alvarado has more on that.