Warning !!!

Before flashing Android 10 firmware ( version ROO-3xx,ROO-4xx ) - check IDENTIFY !!!

if phone have firmware version ROO-2xxx,3xxx,4xxx - you can safely flash Android 10 firmware.

if phone have firmware version 1xxx - 
you MUST use BootFix_Upg.zip from Android_9 folder BEFORE flashing Android 10 firmware.