Mobile communication terminal, wireless data service authentication server, system for automatically blocking voice call connection, and method of processing various messages in mobile communication terminal

摘要

Disclosed is a technology for preventing a legitimate terminal's user from being damaged due to the fraudulent usage of a cloned terminal. A mobile communication terminal transmits authentication information containing terminal usage time information to a wireless network according to a voice call connection procedure, and performs a voice call release process upon receiving an authentication failure message from the wireless network in response to the authentication information.