Isis, the mobile-payment joint venture (JV) between wireless carriers which include AT&T, Verizon Wireless and T-Mobile USA is set to be launched in September 2012.

Verifone, which allows mobile payments through its payment terminals, said that the launch follows months of delays and a change in scheme in 2011 which was earlier planned to be launched in the first half of 2012.

Verifone CEO Doug Bergeron was quoted by CNET as saying: "With the carriers on their side, they stand to have a very good chance to succeed provide the handset makers get NFC-enabled smartphones out as promised."

ISIS has plans to develop a system which would allow consumers to make payments through their smartphones.

The system will deploy near-field communication (NFC) technology, which will allow the clients to tap a special sensor at the register to transfer funds.

Initially ISIS will be tested through its launch in Salt Lake City, Utah, and Austin, Texas, which would confirm its working status to the carriers and its partners.

The JV will basically charge a service fee for the use of its network, which can be operated with all of the main credit cards.

The compatible Android powered devices for ISIS include T-Mobile’s Galaxy S II, Galaxy S III, HTC Amaze 4; Verizon’s DROID Incredible 4G LTE, Galaxy S III; and AT&T’s One X and Galaxy S III.

Google, along with its wireless partner Sprint, has also released the similar system Google Wallet, and carriers are releasing more and more devices with incorporated NFC capability.