ZC550KL Unlock Device App does not unlock bootloader

[alburodanica]

Please tell us some basic information before asking for help:
Model Name: Zenfone Max ZC550KL
Firmware Version: MMB29P.WW_Phone-13.8.2.110-20180110
Rooted or not: Not
Frequency of Occurrence: Always
APP Name & APP Version (If your issue relates to the app): 8916_SIGNED_Android_M_UnlookTool_2016_0715-1.apk
That troubleshooting you've already done, screenshot, etc
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[alburodanica]

This is the exact

[Christine_ASUS]

Hi alburodanica
For ZC550KL, there will no longer have any maintenance. Sorry for any inconvenience this may cause. Thank you for your understanding and support.