I'm pretty that no mag-stripe only payment cards are used in the UK and Europe at all now, and neither in Asia. And all current terminals there are Chip and PIN and/or Tap and Pay capable. Samsung only has MST to support some legacy EPOS terminals in the US, for their Samsung Pay? BTW when I was in the UK, last month I was able to use TenPay and AliPay at a Chinese supermarket in London, which doesn't require a credit card terminal at all. You just scan a printed QR code with your phone.