Pay-by-phone lets you buy online and charge purchases directly to your monthly...

https://speedy-wiki.win/index.php/Where_Is_Carrier_Billing_Used_Besides_App_Stores%3F

Pay-by-phone lets you buy online and charge purchases directly to your monthly phone bill or prepaid credit. It’s a simple, secure way to pay without needing a credit card or separate account. Perfect for quick checkouts on mobile devices.