Carrier billing lets you buy apps, games, or services and charge them directly...

https://storyvergey.com/s/xsMsfPvX_01pyzlQZB4ps

Carrier billing lets you buy apps, games, or services and charge them directly to your mobile phone bill. If you have a monthly plan, the cost shows up on your next bill. For pay-as-you-go users, the amount is taken from your available credit