Huawei has sent to many users a code composed only of numbers that seems the SIM Unlock code. However it has worked to Unlock the Bootloader. Try it, you don't lose anything.
That's the first thing i did. Tried it and it didn't work. This morning i received a second reply with the correct code and this time it worked.
Forgot that after bootloader unlock it does a wipe... so that's something to remember