You have to download fastboot rom (china or global), the fastboot is about 2gb+. Before yoy click on flash there are 3 options in the bottom of the screen. Do not select the lock one.I
I will try one more time to see what is gonna happened and if i can i will go back to Global with MiFlash. How i can do it without lock the bootloader ???? Is there any option to check for this ???