It's official: Isis is going nationwide. After fits and starts, including pilot programs in Austin, Texas, and Salt Lake City, the carrier-led consortium is making the latest version of its mobile wallet available for download today in the Google Play app store and at AT&T, T-Mobile and Verizon Wireless retail stores.

The app will work with more than 40 phones, Isis said, and will require customers to install a free SIM card from their wireless carrier. The carriers said their retail store associates have been trained to provide hands-on support and educate customers about the wallet.

Isis won't work on Apple products because they're not NFC-enabled, but the consortium said that support will come later.

With the launch, customers can now use the Isis mobile wallet at any merchant that accepts contactless payments, including Toys "R" Us, Jamba Juice and Coca-Cola vending machines. The JV is offering deals for using the wallet, including free soft drinks at Coca-Cola vending machines, free smoothies at Jamba Juice and 20 percent back on purchases made with American Express Serve.

The Isis mobile wallet lets consumers shop and pay with a mobile phone, by securely storing virtual versions of credit or prepaid cards, as well as coupons and loyalty cards. The wallet has been redesigned, Isis said, with a simpler user interface.

Isis is one of only a few "truly independent wallets that is not tied to a specific financial institution, merchant or online marketing scheme," Rick Oglesby, senior analyst with the Aite Group, said in a news release. "The wallet-as-a-platform approach positions Isis to unify the consumer experience across the many developing mobile shopping environments. The national rollout is an important step toward making mobile payments a part of everyday retail experiences."

Learn more about mobile/digital wallets.