Modified TWRP
I'm not allowed to give external links for now.
go to google and type "twrp for Redmi 4x" and then select xiaomifirmware link and download TWRP_3.1.1-0_Redmi4x_7.zip
afterwards again boot to twrp and install faceunlock.zip and done.
You can most probably receive OTA Updates but you will lose any root.
download this twrp and boot to it(NEED NOT FLASH) and go to Advanced>Tools>Disable DM-VerifyBut booting to TWRP asks for password! And does it modifies system partition so that safetynet check will fail?
---------- Post added at 08:05 AM ---------- Previous post was at 07:48 AM ----------
Will OTA work?
I'm not allowed to give external links for now.
go to google and type "twrp for Redmi 4x" and then select xiaomifirmware link and download TWRP_3.1.1-0_Redmi4x_7.zip
afterwards again boot to twrp and install faceunlock.zip and done.
You can most probably receive OTA Updates but you will lose any root.