Communication device

A communication device comprises first and second communication modules, a storage module and a processing module. According to data stored in one of at least one SIM (Subscriber Identity Module) card, the first communication module receives a first telecommunication voice signal and transmits a second telecommunication voice signal; the storage module stores the IP address of an action device with a network function; the second communication module receives a first network voice signal from the action device via the Internet, and according to the IP address, stored in the storage module, of the action device transmits a second network voice signal to the action device via the Internet; and the processing module converts the first telecommunication voice signal into the second voice network voice signal, and converts the first network voice signal into the second telecommunication voice signal. 种通讯装置，包含：第通讯模块，根据至少用户识别模块卡的其中者所储存的资料，接收第电信语音信号及传送第二电信语音信号；储存模块，储存具有网络功能的行动装置的网际网络协定位址；第二通讯模块，透过网际网络从该行动装置接收第网络语音信号，及