VDSL Gateway VMG 8825-T50 - can not upgrade FW

Ondra

Hi to all,
maybe someone will know, so I'll ask here.

Where can I find the firmware update option in the hidden settings please?

I wanted to go back to ZyXel after years, but I still doubt why I don't see the option here :-(

I guess it is done somehow via FTP recovery?..

Thank you all very much for your willingness.