Samsung today launched its mobile payment service Down Under.

Australians can now tap and go with Samsung Pay, accepted almost everywhere credit and debit cards are used. Citibank credit card holders and American Express card members carrying a Galaxy S6, S6 Edge, S6 Edge+, S7, S7 Edge, or Galaxy Note 5 can use it.

To make a payment with Samsung Pay, choose the desired card, authenticate the transaction with the fingerprint sensor, and tap the device on the point-of-sale machine.

"Today's launch of Samsung Pay offers more than a secure and convenient way for Samsung smartphone owners to pay," Prasad Gokhale, vice president of Samsung Australia's mobile division, said in a statement. "It's the next development for Australians who use their smartphone as the central device to live, organize and enjoy their lives."

The arrival of Samsung Pay in Oz follows launches in the US, China, South Korea, and Spain.

On Thursday, that list will expand to include Singapore—the first Southeast Asian market to roll out the mobile payment service, in collaboration with American Express, MasterCard, Visa, Citibank, DBS/POSB, OCBC Bank, and Standard Chartered.

"Australia is a market of early technology adopters and by providing a platform open to all partners, ranging from government to financial institutions and retailers, while upholding the highest standards of security and data privacy, Samsung is fueling the transition to a truly digital wallet," Gokhale said.

During its first six months in the US and Korea, Samsung Pay surpassed 5 million registered users; the company has processed more than $1 billion of transactions in South Korea alone.

"This success indicates a tremendous opportunity in Australia, a market where contactless payments are already in strong demand," said Elle Kim, global vice president of Samsung Pay's Mobile Communications Business. "It's our goal to one day replace wallets, by making every card accessible on Samsung smartphones."