The present invention relates to a pay-as-you-go wireless call protocol, and in particular, when a caller wirelessly calls a subscriber through the service line 700, which is a toll communication service line, the service fee is converted into a service charge form of the service 700. By paying to the caller, pay-as-you-go can be realized, and the frequency and code resources can be efficiently utilized by allowing multiple people to share the same cap code for the subscribers who use the radio calling service less frequently. According to the amount of messages left by the caller when using the voice mail service, the memory of the pay-as-you-go wireless calling system installed between the wireless calling system and the user is allocated, and when a predetermined time elapses, the voice recorded message is automatically deleted. To improve the efficiency of the mailbox system It is also possible to provide a pay-as-you-go billing protocol for receiving voicemail services without subscribing to voicemail services provided by telecommunication operators.
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