Carrier billing lets you pay for apps, games, or digital content by adding the...

https://www.last-bookmarks.win/carrier-billing-lets-you-pay-for-apps-music-or-other-digital-purchases-using

Carrier billing lets you pay for apps, games, or digital content by adding the cost to your monthly phone bill or subtracting it from your prepaid balance. It’s a simple way to make purchases without needing a credit card or separate payment app