Hi Emily,
Thanks for your advice. I read your email too, because I submitted a ticket in the official web of Chuwi (http://en.chuwi.com/support/ticket.html).
I have dual boot chuwi hi12
I tried to update it, but the problem persists in Windows. On Android the front camera it does not work, neither.
In addition, the WiFi connection is non-stable. It stops suddenly a lot of times and it works slow. Moreover, I have a lot of problems reading my micro SD card, it works sometimes but it does not work usually.
What Can I do?