The backers of Google Wallet knew from the start that the new payment service, which was launched in the US last year, would take time to take off, according to one of its supporters. Speaking in his keynote presentation at the 2012 GSMA NFC & Mobile Money Summit in Milan, Tomasz Smilowicz, MD, Head of Global Mobile Solutions, Global Transaction Services, Citi, said: “We knew from the beginning it would take time.”