Carrier billing lets you buy apps, games, or other digital items and charge the...

https://www.coast-bookmarks.win/carrier-billing-lets-you-pay-for-apps-games-or-services-by-adding-the-cost-to

Carrier billing lets you buy apps, games, or other digital items and charge the cost directly to your phone bill. If you have a monthly plan, the purchase shows up on your next statement