How to Re-Lock Zenfone Bootloader

The trouble after unlock bootloader : Furthermore, such repaired Revised Product will not be covered under the warranty of the Original Product; the software of the repaired Revised Product will not be deemed the software of the Original Product and will not receive software updates.

But we can re-lock the bootloader

Resources:
Driver (Download Here)Fastboot (Download Here)For a500cg/a600cg onlyDo it With your own Risk Steps:
Download the Latest ROM/Firmware (V1.17.40.1X or latest version)Copy if.bin from system/etc/firmware and ifwi.zip from ROM folder to Fastboot folder

Extract ifwi.zip there will be dnx_fwr_ctp_a500cg.bin and ifwi_ctp_a500cg.bin (if zenfone 6 : dnx_fwr_ctp_a600cg.bin and ifwi_ctp_a600cg.binThe phone turned into bootloader (through when adb reboot bootloader or boot while holding down the volume up+ power button) and connect to a computer through a USB cable and open cmd by press shift + right click, open comand here at fastboot folder).Unlock bootloader syntax: (ZenFone 6 plse dnx_fwr_ctp_a500cg.bin replace by dnx_fwr_ctp_a600cg.bin )fastboot flash dnx dnx_fwr_ctp_a500cg.bin
fastboot flash ifwi if.bin
fastboot reboot-bootloader
Re-Lock Bootloader syntax: (ZenFone 6 plse dnx_fwr_ctp_a500cg.bin replace by dnx_fwr_ctp_a600cg.bin / ifwi_ctp_a500cg.bin replace by ifwi_ctp_a600cg.bin )fastboot flash dnx dnx_fwr_ctp_a500cg.bin
fastboot flash ifwi ifwi_ctp_a500cg.bin
fastboot reboot-bootloaderHow to check the phone is currently locked or unlocked?

Locked:


Unlocked:Thanks to Shakalaca