Pay-by-phone lets you buy digital items quickly by charging purchases directly...

https://troyaeco194.theglensecret.com/can-carrier-billing-help-users-who-do-not-want-banking-apps

Pay-by-phone lets you buy digital items quickly by charging purchases directly to your mobile phone. Whether you have a monthly plan or prepaid credit, the cost appears on your bill or deducts from your balance