A mobile communications device supporting operation on a first wireless technology and a second wireless technology is provided. The device includes a wireless module performing wireless transceiving to and from a first station of a first wireless technology and a second station of a second wireless technology, and a controller module, transmitting a control message prior to the starting of a uplink transmission period of the first wireless technology via the wireless module to occupy the uplink transmission period of the first wireless technology so as to allow transmission of signals of the second wireless technology during the uplink transmission period of the first wireless technology. In operation, the controller module further rearranges the transmission of signals of the second wireless technology to end the transmission of signals of the second wireless technology prior to the starting of a downlink transmission period of the first wireless technology.