From CTIA: Isis mobile wallet adds Amex support

Verizon Wireless, AT&T and T-Mobile USA have added American Express into their Isis mobile-payment venture. Other banks include Chase, Capital One and Barclaycard as card issuers backing the nascent system. Scheduled to launch this summer in Austin, Texas, and in Salt Lake City, the new digital wallet is a major topic at this week’s International CTIA WIRELESS® show, where many executives applauded the technology but others noted the obstacles that is preventing quick adoption.