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Unable to unlock ZS570KL bootloader on two phones, non-pro 2.15GHz

ZT-e31f4bb3
Star II
Please tell us some basic information before asking for help:
Model Name: Zenfone 3 Deluxe non-pro (ZS570KL) 2.15GHz
Firmware Version: WW_Phone-15.0210.1810.73-0 (both phones)
Rooted or not: not rooted
Frequency of Occurrence: Every time
APP Name & APP Version (If your issue relates to the app): "Unlock Device Tool" 9.1.0.3_180621
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
========================================
Both phones have been factory reset and the unlock app says "An unknown error occurs, which may be a network connection issue. please wait and try again later"
Serial numbers:
************
These phones have never been unlocked.
I would appreciate help in getting both of these unlocked.
6 REPLIES 6

ZT-e31f4bb3
Star II
The "Driver and Tools" download section doesn't return anything anymore.

ZT-e31f4bb3
Star II
It looks like the download section isn't working with Chrome, but works with Firefox.
The new unlock tool worked. Thank you!