I have a Jensen VX 7020 head unit, and it has started a "GPS Signal Lost" voice command. This happens many times during the day. I read on another post that if you create a file on the micro SD card in the radio.... something like Sig - 0 . I have the exact terminology and wording. WHen I tried to put it on the card and reinstalled the card in the radio.... it made no difference. Maybe I didn't put the file on correctly. Can you help with the exact procedure on how to do this? Thank you.