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

https://blogfreely.net/neasalnfbo/fingerprint-payment-vs-saved-card-which-do-people-trust-more

Pay-by-phone lets you buy online and charge purchases directly to your phone bill or prepaid credit. It’s a simple way to pay without needing a credit card, making checkout quicker and easier, especially on mobile devices