i tried what you post with the app “build prop editor” and i found the location of “ro.build.version.release=4.4.4” and change to “ro.build.version.release=5.0.0”. but the app wants me to restart the chuwi hi8 but i dont have button restart.
i shutdown the chuwi and when i go back to the app,i see its go back to “4.4.4”