South Korea is already a few steps ahead in the drive for a cashless society.
In one of the most technologically advanced countries on the planet, the e-commerce market is said to be worth around $500bn a year. Online banking, credit cards and travel cards are already in widespread use.
But the government believes the mobile phone is the key to the future - a payment system that could finally lead to the long-heralded demise of notes and coins.
John Sudworth reports from Seoul.