Carrier billing lets you buy apps, games, or digital content and charge the...

https://rileysexcellentnews.readspirex.com/posts/what-should-i-do-if-i-do-not-recognize-a-carrier-billing-charge

Carrier billing lets you buy apps, games, or digital content and charge the cost directly to your phone bill. If you’re on a monthly plan, the purchase appears on your next bill. For pay-as-you-go users, the amount is taken from your available credit