Xiaomi Roborock v2 firmware update via usb?

Hi everybody,
I am not sure, is this good place to ask, but I try:) I uploaded firmware in v2 to change region to china, I got token, ip - everything looks fine with almost successfull finish, but vacuum shows internal error. I try factory default and now it is working but it speak in china:) and works only manual - by pressing button. When I try to add it to app - it is ok, but it shows that this item is not certified and there is no possibility to do anything, like wrong region. The same at all apps versions, I try many times to change region to other - china, europe usa and all the time. Now I can’t get token to try update firmware, so my question is how to try upload firmware - If there is no possibility via lan, maybe via usb on motherboard? Anyone try this?

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hi, i have your same problem.
did you manage to solve in any way?