- Oct 16, 2019
I am surprised that you say fingerprint and voice control does not work. Are you sure you are flashing proper stock ROM to start with? I used this https://www.cubot.net/Support/id/19/cid/15.html
Edit: Now flash LineageOS 17.x GSI. Everything worked perfectly fine for me. I had to use the overlay because I wanted minimum brightness to 1
From my limited experience CUBOT/X19 framework-res.apk had weird unknown values. I did not use this apk at all.
For your other question: I did not try LOS18 as I do not have the device. Sorry.