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

https://www.insert-bookmark.win/carrier-billing-lets-you-buy-digital-goods-or-services-using-your-phone-the

Carrier billing lets you buy apps, games, or subscriptions and have the cost added to your monthly phone bill or taken from your prepaid credit. It’s a simple way to pay without entering card details, making small purchases easier on your phone.