Thanks & yes, I don't expect much in the way of global updates. I was more thinking that with the G firmware one has the option to change to the A version which gets regular updates. I like playing around with different firmwares but having the RU version it won't be possible unless someone finds a way.
It is usually possible to flash china firmware on devices with global firmware (but not the other way around). I had Meizu 15 Plus with the chinese firmware, had to pay $15 to a guy who changed the device ID to global, it was then possible to flash the global firmware. Perhaps you can send him a message and ask about your problem: https://www.facebook.com/nguyenle.huu.5
I will probably stay on global firmware on my device. Android Auto and google contact sync does not work on chinese firmware.