As I believe few here have a Thinkware F750 dash cam, this might be useful.

You can easily upgrade your F750 to a F770.
The internal hardware is the same. This is the procedure:

- Format the SD card
- Download the latest F770 firmware
- Extract the zip file
- Copy the extracted file to the SD card
- Rename the file F770-pkg.bin to F750-pkg.bin
- Insert the SD card and switch on the camera
- update takes about 10-15 minutes (you get an aural message on start and when ended)
DO NOT TURN OFF THE CAMERA DURING THE UPDATE.

Done, now you have a F770, except for the slick exterior.

Future firmware updates you do not rename the files, the camera now think is a F770 Former Mod/Member, with the most post & Chicken George Arch nemesis