The concept of paying for purchases at the checkout with your smartphone is still pretty new, but it is definitely being pushed as a convenient and secure way to handles these transactions.
Mobile wallets and payment apps: they’re supposed to make it simpler and easier to pay for stuff, or at least let us grab lunch when we’ve forgotten our wallet. Yet there’s now a wide variety of payment apps out there, including systems that are only for one brand of phone (Samsung Pay, Apple Pay) or only for one retailer (Walmart Pay). Which can you use for what purpose? Which is compatible with ancient smartphones?