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Unlock Device App does not unlock bootloader

Please tell us some basic information before asking for help:
Model Name: Zenfone 5 ZE620KL
Firmware Version: WW_15_0610_1801_42
Rooted or not: NOT
Frequency of Occurrence: Always
APP Name & APP Version (If your issue relates to the app): Unlock Device App

The program does not unlock the bootloader, writes (An unknown error occurs, which may be a network connection issue. please wait and try again later)
125 REPLIES 125

501231073
Star I
Unlock Device App does not unlock bootloader Zenfone 5Z ZS620KL

Model Name: Zenfone 5Z ZS620KL
Firmware Version: WW-100.10.107.87
Rooted or not: NOT
Frequency of Occurrence: Always
APP Name & APP Version (If your issue relates to the app): Unlock Device App
screenshot-20200611-105602604.jpg

Christine_ASUS
Community Legend II
Hi 501231073
Please check on your inbox and PM me your SN. Thank you.

Christine_ASUS
Community Legend II
Hi yusufarifin532
Thank you for providing me the info. After investigating by the tech team, they found out that your device had unlocked once in February. Did you perform the unlock movement before or did you purchased the device from second-hand resource? Have you change the motherboard before?

In my case, I performed the unlock when I first purchased the phone in 2018, but it went into an unbootable (soft brick) state, so I had to use the firehose to restore a factory image. I was able to unlock again at that point; but recently, I wanted to update the software version and it wouldn't let me, so I ran the firehose process again, updated to the latest software, and tried unlocking to no avail.

sheky
Star I
hi agent,
I am also having the same problem. But as you said, i unlocked it long back. and never relocked it.but recently i ve changed the mother board from ASUS Authoraised service centre. since then i am getting the same error. My model is ASus 6z,bought in july2019 india. I ve titanium backup of my old apps and data. so i nee desperately need root.
pls help