FW versions for the Mavic, RC, and Goggles should all match.
i think that this is necessary because cause errors of signal lost, low range, im using the last firmware v1.4.000 with altitude mod force eddited by me, but the signal disapears in 2100m of altitude and the RC is disconect automatic, It was not a good idea to edit the firmware but i cant downgrade the RC v.0700 any help is appreciated.