DeviceFidelity and Visa collaborated to combine Visa's contactless payment technology, Visa payWave, and In2Pay technology to transform a mobile phone with a microSD memory slot into a mobile contactless payment device.

ENGADGET: In2Pay is the name of Visa and DeviceFidelity's money-grubbing iPhone case

The case is equipped with a payment technology called Near Field Communication (NFC), which allows customers to make safe and secure purchases with U.S. Bank Go Mobile at thousands of participating retailers that accept Visa payWave.

ENGADGET: US Bank kicks off 'Go Mobile' payment trials with NFC-equipped iPhone case

Available in all form factors for 2G, 3G and 4G handsets, the UpTeq NFC supports contactless payment and other secure services via AMEX ExpressPay, MasterCard PayPass and Visa payWave, providing unmatched flexibility to service providers and end users.

ENGADGET: Gemalto adds AMEX, Mastercard and Visa certs to its UpTeq NFC SIM

On Monday, Visa said it is working with Samsung, which is planning to equip its new mobile devices with a Visa technology called payWave.

WSJ: Card Networks Take on Plastic With Mobile Platforms