Visa has had a busy couple of weeks. First the company announced the Visa Ready Partner Program, which certifies that devices, software and solutions used to process Visa transactions, such as mobile point of sale readers, are compatible with Visa's requirements. The company also unveiled a partnership with Samsung to include Visa's payWave technology on all next-gen Samsung handsets. FierceMobileContent's Sandhya Raman spoke with Bill Gajda, Visa's global head of mobile since 2010, at last week's Mobile World Congress trade show to talk about these announcements and Visa's mobile strategy at large. Gadja said he remains bullish that Near Field Communications will be the main technology used for mobile payments. "I think that NFC will be the most broadly used technology for mobile at the point of sale, merchant terminal manufacturer or software developer; we can kind of develop a certainty because it's a global standard that has been developed for over 10 years," he said. Check out the full Hot Seat interview here.