Above: These are dongles that plug into the headphone jack of a phone or tablet. It is used to accept credit cards through swipe, for payment. Together with the app, this is how point of sale payment processing works in the U.S.Long Apple if the loyal user base upgrades to the iPhone 7. Anecdotal evidence suggests consumers are broke from the last device purchase. They will delay upgrading to this model. Instead, buying an iPhone 6S makes more financial sense. $AAPL, Apple Inc. / 60