Customers of T-Mobile in the Netherlands should be able to start charging Google Play purchases to their phone bills, in addition to more traditional payment methods. Google has updated its support pages to reflect the change.
Competing mobile carrier Hi in the Netherlands got carrier billing last year. At the time, Dutch news sources were reporting that T-Mobile would be getting carrier billing soon, as it already had deals in place in many other EU nations. It's taken a little while to get there, but everything should be up and running. Customers don't have to make any changes on their end – simply choose the carrier billing option in the Play Store when checking out.