Please tell us some basic information before asking for help:
Model Name:ZC550KL
Firmware Version: WW_13.8.26.110_20180110
Rooted or not: NO
Frequency of Occurrence: Everytime
APP Name & APP Version (If your issue relates to the app): Unlock device tool
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.
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Hello
I can't unlock the bootloader because when I use the app an unknown error appears probably due to the network.