These services will be enabled on through apps from banks and other financial institutions on the Google Play Store. The apps will enable you to pay with your Visa account from your phone:

Following a one-time enrollment process, customers of participating financial institutions who download and install the application will be able to pay in-store with their Visa accounts by waving their Android mobile phone in front of a contactless reader. These capabilities are an integral part of Visa Digital Solutions, a comprehensive suite of offerings that facilitate secure payments across a broad range of Internet-connected devices and wearables.

Apps from BBVA Cuscal have already launched their apps. Applications from Banco do Brazil, PNC Bank, N.A., and U.S. Bank are all expected in the near future.

Visa's new payment service partnerships are an outgrowth of Visa Digital Solutions, an initiative launched by the company last year. It includes Visa's own SDK, their Token Service, and their support of Host Card Emulation, which allows payment information to be validated and stored off-site, making NFC payments more widely available.

Source: Visa