The plan would link 25 million registered users, Zurich-based EMPSA said, adding it expects more countries and mobile payment systems to sign up for the project in the coming months.

The payment services that have signed up so far include Denmark's MobilePay, Portugal's SIBS/MB WAY and Sweden's Swish, EMPSA said.

"With this cross-border cooperation we want to meet the wish of our users to be able to use their local mobile payment system internationally," Soren Mose, chairman of EMPSA, said in a statement.

The association already connects more than 350 banks.

The other payment services that signed up to the project are

Bancontact Payconiq Company (Belgium), Bluecode (Austria and Germany), TWINT (Switzerland) and VIPPS (Norway).

Most of the payment services are owned by banks in their respective countries.

(Reporting by Nikolaj Skydsgaard; Editing by Susan Fenton)