Generate a sn.img for Lenovo new-gen devices.

Retrieve bootloader SN with:

fastboot getvar all

Concatenate Bootloader_SN_Part1 and Bootloader_SN_Part2 OR:

adb shell getprop ro.boot.bootload_sn

The SN must be 64 characters.

Unlock commands:

fastboot flash unlock sn.img
fastboot oem unlock

Sample: 99EE50221221864D50C60BAEA6F14D8AC2E235CC6E78BE6088CD40CC97FCA394

Your input is processed locally and is never sent to any server.