“Four of the largest credit card issuers in the world — MasterCard, Visa, American Express, and Discover — have all announced today that they’re joining ISIS, a partnership of American carriers formed last year aimed at bringing mobile payment capability to phones in early 2012. Needless to say, that adds a lot of muscle to ISIS’ network now that they’ve got the most important credit cards tied in and ready to be linked to your phone.” - × × ×