Carrier billing service provider Boku and partner Microsoft have expanded services into Spain, Austria and Romania.
The expansion brings the ability for mobile subscribers to make purchases across Windows 10 devices using only their mobile account.
Boku says carrier partner Orange will bring the service to its customers in Spain and Romania, offering a new payment option to more than 23 million mobile subscribers. In Austria, more than five million A1 mobile subscribers will receive carrier billing as a payment option the next time they log into their Windows Store account.
Past funding rounds have allowed San Francisco-based Boku to concentrate on bringing carrier billing into more developed countries.