Sorry my bad. I check one more time. It recovering to 18 and all the time I install the patch on it and then check the version and it will 20. Now I recover one more time, check and it is 18 but I have another problem. When I connect it to the MDC there is no update for me. I check already on two computers. I'll check it tommorow and we will see . Model is nav4 for sure. I already make few devices nav4 but first time I forgot to update navcore before patch.