problem in unlock bootloader

[almeerafridi]

ZF Model: ZD553KL
RAM: 2G
Firmware/APP Version: ww-14.0400/1708.154.-20170824
Frequency of Occurrence: nil
Rooted: No
APP Name: device unlock app

i have this asus device and when i try to unlock bootloader device just reboot but bootloader still locked, i need it in urgent and very badly, in this thread this person unlocked it, but idk which version he used, https://www.asus.com/zentalk/ph/thread-200141-1-1.html

[Y_ASUS]

Hi almeerafridi, Are you using this unlock tool downloaded from our website? --> https://www.asus.com/Phone/ZenFone-4-Selfie-ZD553KL/HelpDesk_Download/ > Select Android OS > Utilities > Version UnlockTool (Android N). If yes, please show me the error message screenshot. Thanks for your help 🙂

[almeerafridi]

Jei_ASUS posted on 2019/7/17 13:06 Hi almeerafridi, Are you using this unlock tool downloaded from our website? -->

thanks alot for your time and reply, bro now i find out the way to unlock it, now the prob is diag mode not working on it, i flashed csc also but still same,