Article Photos: Companies struggle to popularize mobile money

FILE - In this Feb. 27, 2013 photo, a man uses the NFC payment Visa system at the Mobile World Congress, the world's largest mobile phone trade show, in Barcelona, Spain. (AP Photo/Manu Fernandez, File)

FILE - In this Feb. 27, 2013 photo, a man uses the NFC payment Visa system at the Mobile World Congress, the world's largest mobile phone trade show, in Barcelona, Spain. (AP Photo/Manu Fernandez, File)