Por aquí una parte del log por si sirve de algo:
"8/11/2015 09:30:52.172 FlashTool[5548][4552][D]: USBSetting::SearchUSBPortPool(): USB port is obtained. path name(\\?\usb#vid_0e8d&pid_0003#5&543957f&0&10#{a5d cbf10-6530-11d2-901f-00c04fb951ed}), port name(MTK USB Port (COM3))(..\..\qt_flash_tool\Conn\USBSetting.cpp,15 7)
08/11/2015 09:30:52.172 FlashTool[5548][4552][D]: USBSetting::Search(): Scaning USB port succeeded!(..\..\qt_flash_tool\Conn\USBSetting.cpp ,144)
08/11/2015 09:30:52.172 FlashTool[5548][4552][D]: APCore::ConnMediaUSB::PreConnect(): USB port detected: \\?\usb#vid_0e8d&pid_0003#5&543957f&0&10#{a5dcbf10-6530-11d2-901f-00c04fb951ed}(..\..\qt_flash_tool\Conn\ConnMedia.c pp,62)
08/11/2015 09:30:52.180 FlashTool[5548][4552][D]: APCore::Connection::ConnectBROM(): BROM connected(..\..\qt_flash_tool\Conn\Connection.cpp, 80)
08/11/2015 09:30:52.180 FlashTool[5548][4552][D]: APCore::Connection::ConnectDA(): Downloading & Connecting to DA...(..\..\qt_flash_tool\Conn\Connection.cpp,111)
08/11/2015 09:30:52.183 FlashTool[5548][4552][D]: BromBootArg::cb_com_init_stage(): COM port is open. Trying to sync with the target...(..\..\qt_flash_tool\Arg\BootRomArg.cpp,1 84)
08/11/2015 09:30:52.183 FlashTool[5548][4552][D]: BromBootArg::cb_com_init_stage(): hCOM(0000073C).(..\..\qt_flash_tool\Arg\BootRomArg .cpp,186)
08/11/2015 09:30:53.827 FlashTool[5548][4552][D]: APCore::Connection::ConnectDA(): Failed to Connect DA: S_STORAGE_NOT_MATCH(..\..\qt_flash_tool\Conn\Conne ction.cpp,126)
08/11/2015 09:30:53.838 FlashTool[5548][4552][D]: BackgroundWorker::run(): BROM Exception! ( BROM ERROR : S_STORAGE_NOT_MATCH (3167)"