Después de mandar el mail para devolverlo, hoy me han contestado esto
Hi there
Thank you for your email.
We apologize for the trouble.
For the case, could you please reset the firmware to check if the problem still exist?
Here is the link you can download:
http://blog.geekbuying.com/2017/09/x...ware-20170907
Here please try more times as it maybe help to solve the problem .
Sincerely
Está tarde trasteare un poco