Cannot change language to Czech

[heroo]

Hello guys, when I start my ZIIO10 it says something about crashed application for com.android.deskclock stopped unexpectedly.
It is after fw update, I tried all factory resets possible, even power and + option.
Also when I change language to Czech, after restart it is again english. But on the language screen I can see CZ sign instead of US.
How can I solve this?
Thanks

[heroo]

Hello guys, anyone has got any idea? I am desperate. Since the beginning I have problems with this device.
I would like to try other reset. Maybe with ADB. Could somedy explain me how to do it?
I also tried reflashing with the firmware and no change.
Thanks

[Kok-Choy]

Hi,

I would suggest you take this up with customer support for further assistance since you have already tried reflashing the firmware.