Patent ID: 6999750

Claim:
A prepaid system, comprising: a prepaid deposit management unit configured to manage a deposit of a communication terminal; a prepaid number management unit configured to provide a prepaid number for the prepaid deposit management unit; a prepaid charge unit configured to authenticate the prepaid number; and a charge system configured to charge for a communication made by the communication terminal, wherein the prepaid number management unit transmits a prepaid number related to a predetermined amount of money to the communication terminal through the prepaid deposit management unit in response to a request of the communication terminal when the deposit of the communication terminal is greater than the predetermined amount of money, and subtracts the predetermined amount of money from the deposit of the communication terminal; and the prepaid number is sent from the communication terminal to the charge system through the prepaid charge unit to pay for a communication charge of the communication terminal by using the predetermined amount of money related to the prepaid number.