ISIS, a mobile payment partnership between AT&T, T-Mobile, and Verizon, has released its first app onto Google Play that was pushed back from the initial September plan. The app, ISIS Mobile Wallet, only works with the Galaxy S III and Galaxy Relay 4G on T-Mobile in Salt Lake City, Utah or Austin, and it requires a special SIM card courtesy of ISIS, as MobileBurn noted. T-Mobile and the ISIS have not announced anything specific about the app, but you can give it a test run over at Google Play.

There is no word if AT&T or Verizon will receive a similar app for its NFC-enabled devices. If you are wondering about the nation’s No. 3 carrier, Sprint is not apart of the ISIS. It is partnered with Google Wallet on many of its phones. Furthermore, Sprint is rumored to announce its own payment platform sometime in the future.

Yesterday, TmoNews reported that T-Mobile users would receive a $25 credit when signing up and the service will officially launch in a pilot program Oct. 22.

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