Carrier billing lets you pay for apps, games, and other digital purchases by...

https://www.hotel-bookmarkings.win/carrier-billing-lets-you-buy-apps-games-or-digital-content-and-charge-the-2

Carrier billing lets you pay for apps, games, and other digital purchases by adding the cost directly to your monthly phone bill or taking it from your prepaid credit. It’s a simple way to buy without needing a credit card or separate payment app.