Asus unveiled the ZenFone 6 last week, and today, this Taiwanese tech giant has released the bootloader unlock tool and kernel source code for its 2019 flagship. You can download both of these by heading over to the source link at the end of this article. The bootloader unlock tool weighs 753KB in size whereas the kernel source code weighs around 165MB. With these, you can install a custom ROM on your ZenFone 6, or can develop one yourself. But, do keep in mind that unlocking the bootloader will void the warranty of your smartphone and you also won't receive any OTAs from Asus. ...
Source: https://www.gsmarena.com/asus_zenfone_6_bootloader_unlock_tool_kernel_source_code-news-37137.php