HC-550M & HC-550G Old Version Firmware( SN number before 2017.5 )
HC-550G & HC-550M Firmware Ver.20180403
There are 3 steps to proceed system upgrade:
Step 1: unzip and copy the FWR801.bin to a new TF card and insert this TF card into your camera.
Step 2: switch from OFF to TEST, there is red LED keep flashing about 15 seconds, then camera screen will light up.
Step 3: delete the FWR801.bin from TF card(format sd card or connect to PC via usb cable to delete), then switch TEST to OFF and restart camera.