Samsung Pay was supposed to work with Discover cards in 2016 (it was announced in 2015), but the year came and went without support. And that's no small problem if you like tap-to-pay purchases. While Discover isn't the biggest name in the credit business, it has over 51 million card holders. Thankfully, that conspicuous gap appears to have closed: Samsung phone owners have noticed that Discover support quietly went live in recent days. We've asked both Samsung and Discover for comment, but Samsung hasn't updated its compatibility list as of this writing. Don't be surprised if the two are waiting before making the news official.