Basically self explanatory, Lets say i have an app i want to buy something however I don’t have enough and then someone pays me on the app and I have enough money, how does the card know you have the right amount of money without wifi and how does it uptade real time with no internet
In: Technology
A credit or debit card doesn’t really know anything. It’s very little more than a number and some security measures to prevent people from spoofing that number. All of the payment magic happens on the network.
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