Samsung has launched its mobile payment system in the US with new biometrics-based upgrades.Users of Samsung Pay, went live in the US on Monday, will now be able to use a 'Simple Pay' menu, which offers up a selection of ways to launch the payment app quickly.It is now possible to pay through a lock screen, while touching the sensor.Meanwhile, instead of having to tap on the card to see information, virtual card numbers are now display alongside each card by default.There's also a new 'About' screen in the app, which comes with an update button to check for the latest software.Samsung Pay works with Galaxy S6, S6 Edge, Note 5 and S6 Edge+ smartphones running on wireless networks from AT&T, T-Mobile, Sprint and US Cellular.”Samsung Pay works with almost any card terminal from day one and Galaxy owners can shop with a wallet they never knew was always in their hands,” Injong Rhee, head of Samsung Pay, said in a press release.Giving the service an advantage over Apple Pay, Samsung Pay not only uses NFC but also a LoopPay technology called Magnetic Secure Transmission that works by holding the phone near a traditional card swipe reader, essentially making it backward compatible for nearly all payment terminals.