Abstract: A wireless device having dual bus architecture for interfacing with cellular signals and short-range radio signals is provided in an embodiment of the present invention. A first bus couples a first processor to a first transceiver capable to transmit and receive cellular signals. A second bus couples a second processor to a second transceiver capable to transmit and receive short-range radio signals. A third bus is coupled to the first processor and the second processor for transferring multiplexed commands and data. A fourth bus is coupled to the first processor and the second processor for transferring an audio signal, such as a human voice. In an embodiment of the present invention, each processor has a universal a synchronous receiver-transmitter (“UART”) coupled to the third bus, such as a RS-232 bus, and the fourth bus is a pulse code modulation (“PCM”) bus.