Best answer by Max
In response to your enquiry, we would like to inform you that the unlock code application service has ended, as of July 25th 2018, to ensure user experience and safety. Moreover, unlocking the bootloader of a device voids the warranty and it wasn’t recommended since it was the source of multiple software issues due to unauthorized software modifications.
Huawei used to provide users with corresponding unlock codes to meet personalized requirements due to the usage of different ROMs, which is an extra service and does not belong to consumers' rights.
However, due to possible problems caused by unlocking your device (such as system built-in function failure, device freezing, and power consumption increase) we will no longer provide the code.