ISIS, the mobile payment joint venture backed by AT&T, T-Mobile, and Verizon Wireless, has seen its share of launch delays and setbacks. Originally scheduled for a September trial launch, it was delayed and pushed back with no launch date in sight. However, new information obtained by TmoNews and Droid-Life indicates that the trial for ISIS will begin in two cities on October 22nd.

According to an image of T-Mobile's internal messaging portal for employees, the ISIS trial will launch for select devices on October 22nd in Salt Lake City, Utah and Austin, Texas. In addition to the launch date, the image shows that the ISIS app will be made available in the Google Play Store on that day, meaning that it likely won't be limited to just T-Mobile users. It will, however, be limited to ISIS compatible SIM cards and specific Android devices. Additionally, users with rooted devices will not be able to use ISIS services, likely as a result of security measures. T-Mobile will apparently offer new ISIS users $10 in free credit when they sign up for the service, and another $15 in credit when they convert the ISIS card to a reload-able prepaid card.

Only two launch cities, specific devices, and special SIM cards will give ISIS a limited appeal

All of this lines up with what Droid-Life learned about Verizon's ISIS plans last week. According to Droid-Life's sources, Verizon will launch ISIS on October 22nd as well, and it too is limiting the service to special NFC-equipped SIM cards and specific devices. Verizon will allegedly be offering new HTC Droid Incredible 4G LTE owners a free $50 prepaid Visa gift card when they activate ISIS on the device between October 22nd and November 20th. Verizon is also reportedly offering the same $10 and $15 incentives to new ISIS users as T-Mobile.

We have reached out to T-Mobile, Verizon, and ISIS for comments on their launch plans, and wil update this post if we hear back.