Penso que em relação à nova (1080p) a solução deve ser parecida.
Devem apenas faltar os pormenores da receita.
Contactei a ***** e indicaram-me outra "receita" associada a um novo ficheiro.
Vou partilhar:
Please follow these steps below to fix the cam:
* Turn off the camera
* Pull out the memory card
* Format the sd in FAT32
* Extract and copy the firmware file to the memory card home (link for the firmware - "Home")
https://yadi.sk/d/KCkz0xjpjmK5o
* Turn on the camera and hold down the reset button for 6-8 seconds
* Turn off the camera
* Insert the memory card
* Turn on the camera
* Wait for about 5 minutes (will flash orange, then turn orange, then speak Chinese and then will flash orange)
* Connect the camera via the camera app
A new MI account is suggested, because of any previously stored location and camera data.
Assim que conseguir vou tentar esta solução e dou feedback.