The largest smartphone manufacturer in the world launched Samsung Pay for contactless mobile payments in South Korea and the U.S. in the fourth quarter of 2015. Samsung Pay is now available in 22 markets through more than 900 issuer and network partners. Unlike Apple Pay and Google Pay, which rely exclusively on near field communication (NFC) card readers to execute payments inside stores, Samsung Pay phones have access to nearly every POS terminal in the world through MST (magnetic secure transmission) technology, which emulates a magnetic stripe transaction. The vast majority of the more tha...