Samsung Pay will work with most merchants at launch because they won’t have to invest in new hardware just to accept this payment method, merchants can use their existing machines to accept payments using Samsung Pay as the service leans on MST or Magnetic Secure Transmission and NFC or Near Field Communication.
you first have to authorize payments by scanning your fingerprint on your Galaxy device, then simply hold the device against a terminal compatible with NFC and MST (Magnetic Secure Transmission). And that’s all there is to it: your payment is made within seconds.
The Galaxy S6 and Galaxy S6 edge are the first handsets capable of using Samsung Pay, but others will be released soon. For example, the Galaxy Note 5 (expected to be announced this September) will certainly also play nice with the new payment service.