Carrier billing lets you buy apps, games, or media by adding the cost to your...

https://miloyyxi461.huicopper.com/how-do-i-decide-when-to-use-carrier-billing-vs-a-card

Carrier billing lets you buy apps, games, or media by adding the cost to your phone bill or deducting it from your pay-as-you-go balance. It’s a simple way to pay without needing a credit card or separate account