Thanks for this! I am unable to root my phone because DCUnlocker doesn't work with FRD-L14. But, with this tutorial, I was able to upgrade to Oreo/EMUI8 by downloading the FRD-L14C567B560 8.0.0.560 firmware.
Obviously I had to use Method 1 since I'm not rooted, and I also couldn't do section A of method 1, since I couldn't flash a recovery partition. But I was able to do all of section B.
Things went well at first in section C. I had to use HiSuite_5.0.1.300_OVE to get HiSuite to recognize the update.
I didn't get to see the phone reboot after the installation, but when I turned on the screen after it was booted, it was just a blank screen with a solid back button and the other two buttons were just blinking.
To fix this problem, I did a factory reset.
The next time I booted into Oreo, things went well, until I noticed that all google apps were missing, including the play store. At this point I panicked a bit. But here's what I did to fix it: I just went into settings and selected system update. And I got lucky! It said there was an update to FRD-L14.8.0.0.560(C567) (even though that was even listed as the Current Version). So I selected the update, let it download, then it restarted, did it's installation, and when it was done, I had Oreo and all the apps!
I still wish I could unlock and root the dam3d thing! That's what I get for taking a chance on a second hand phone w/o reading that Huawei no longer allowed you to get your unlock code!