еще тут
http://ham-dmr.nl/?page_id=605 нашел какоето обновление прошивки.
Power off the subscriber,and take down the battery
Connect the subscriber to PC.
Hold SK1 then put in the battery, wait for 3~5 seconds, then release SK1,so as to enter the download mode.
Run the software, select the right COM .
Click “Upgrade” in the main interface to begin, the information up the progress bar will turn to “Updating, please wait...”.
The progress bar will display rate after about 5 seconds later, and about 1 minute later will prompt All update completed successfully! Restart radio, please!" after finished:
что за кнопка такая SK1 ? вроде все комбинации проверил и не получается