Abstract: A user utilizes a wireless communications device, such as a cellular telephone, capable of establishing a connection with a credit card server located at a credit card service center associated with the issuer of the credit card held by the user. Stored within the wireless communications device is information on the credit card including the credit card number, expiration date, and credit card service center phone number and/or IP address. Utilizing a user interface in the wireless communications device, the user, when presented with a bill, enters the bill amount and the merchant ID number, and optionally a transaction number. The wireless communications device dials up the credit card service center and sends the transaction information. After authentication and approval, the credit card service center debits the user's account, credits the merchant's account, and sends approval messages to the user and the merchant in real time.