Carrier billing lets you buy apps, games, or services and have the cost added...

https://www.bookmarkingtraffic.win/carrier-billing-lets-you-buy-apps-games-or-services-and-have-the-cost-added

Carrier billing lets you buy apps, games, or services and have the cost added to your monthly phone bill or taken from your prepaid balance. It’s a simple way to pay without using a credit card or entering payment details every time