ISIS has announced that its Mobile Wallet platform will support three different American Express cards when it eventually launches later in the year. The credit card company originally teamed up with ISIS last July — alongside the likes of Master Card, Visa, and Discover — and today revealed that the agreement will include support for its US Consumer, Open Small Business, and Serve cards. The deal will let consumers add the cards to a virtual wallet, which they can use to shop using an NFC-enabled smartphone.

Support for the cards will begin later this year when ISIS will make its debut in two pilot cities: Austin and Salt Lake City. While ISIS has managed to build up a pretty solid line-up of partners prior to launch — the service is actually a joint venture between AT&T, T-Mobile, and Verizon — it remains to be seen whether or not consumers actually want to use mobile payment solutions. In the mean time, we'll just have to watch the likes of ISIS, Google Wallet,, and PayPass Wallet duke it out for supremacy.