Je viens de recevoir la réponse du support de Qubino, c’est pas très encourageant:
Unfortunately the series from 2016 can’t be updated with the latest firmware because in the year 2018 we had to change the flash drive of the devices because the ones we were using went out of production, for this we had to rewrite all the firmwares of the devices, because of that the newer firmware is not compatible with the older hardware.
Je vais voir s’ils font un geste commercial