Samsung has made great strides in growing its mobile payment service, Samsung Pay, since its initial launch three years ago, adding new capabilities and expanding into new markets ... To do so, users will have to check the new Cash Back of the Samsung Pay app, where they'll find a selection of offers from a variety of leading retailers ... Then, after selecting the desired offer and making a purchase at the selected retailer, users will get some of the money back to use in a future purchase using Samsung Pay.