Carrier billing lets you buy apps, games, or digital content by charging the...

https://andersonbwym978.bearsfanteamshop.com/are-carrier-billing-limits-a-feature-or-a-bug

Carrier billing lets you buy apps, games, or digital content by charging the cost directly to your phone bill. If you have a monthly plan, purchases appear on your next statement. For pay-as-you-go users, the amount is taken from your available credit