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

https://remingtonsgreatchat.wordcanopy.com/posts/how-to-make-payments-feel-invisible-without-confusing-users

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