Da vinci team ha contestado mi mail de soporte. Me han puesto:

Hello,

thank you for your request.

maybe you should try to read forums again where this method is described
as we know, you tried to upload cmz_config.xml, did you?
after that you should put default_update.xml into other folder manually and
then make master-reset

we can't support this since you uploaded the file, other steps are out of our
control

Kind regards,

Your Davinci Support Team


Segun puedo entender me dicen que tengo que poner manualmente el default_upgrade.xml en la carpeta otros del telefono y luego hacer un master reset. Es esto correcto? Para poder aplicar los cambios debo hacer un master reset del telefono?