[Honor 8 Questions & Answers] paulLi_01:
I just realized that I probably bricked my phone while trying to install a ROM.

After failing to install the custom ROM, my phone displayed that it is unable to mount:

Failed to mount '/cust' (Invalid Argument)

Failed to mount '/vendor' (Invalid Argument)

Failed to mount '/product' (Invalid Argument)

I have tried to use TWRP to:

Change file system for all of these partitions by switching to EXT2 back to EXT4 but resulted in error messages like this:

Unable to wipe Vendor

Error changing file system

Next I tried to repair these partitions but only resulted in this error message:

Repairing Vendor using e2fsck...

/sbin/e2fsck -fp process ended with ERROR: 16

Unable to repair Vendor

I concluded that perhaps the cust, vendor, and product partitions don't exist.

I then tried to use bootloader to erase the existing partitions of cust, vendor, and product and since my device originally doesn't have a vendor, I decided to just delete and reinstall it (except for cust & product):

platform-tools> .\fastboot.exe erase vendor
Erasing 'vendor' FAILED (remote: 'Command not allowed')Erasing 'vendor'
fastboot: error: Command failed

platform-tools> .\fastboot.exe erase cust
Erasing 'cust' FAILED (remote: 'Command not allowed')
fastboot: error: Command failed

platform-tools> .\fastboot.exe flash cust .\System\CUST.img
Sending 'cust' (258509 KB) OKAY [ 6.442s]
Writing 'cust' FAILED (remote: 'partition error')
fastboot: error: Command failed

After these error messages, I tried installing another custom OS that worked previously but it seems like the phone is stuck in the "your device is currently booting" screen although the initial installation of the OS was successful in TWRP besides the error messages of:

Failed to mount '/cust' (Invalid Argument)

Failed to mount '/vendor' (Invalid Argument)

Failed to mount '/product' (Invalid Argument)

I searched online and found that I could use the dload method by having an UPDATE.APP inside a folder called dload on a SD Card which should allow your huawei phone to boot into the stock image. Unfortunately, that did absolutely nothing.

I have then tried to flash the stock BOOT.img from the UPDATE.APP through fastboot:

platform-tools> .\fastboot.exe boot .\System\BOOT.img
creating boot image...
creating boot image - 15863808 bytes
Sending 'boot.img' (15492 KB) OKAY [ 0.332s]
Booting FAILED (remote: 'Command not allowed')
fastboot: error: Command failed

but unfortunately with no success...

I have tried connecting HiSuite with the phone in bootloader but HiSuite returned a message saying that this device isn't supported.

I have lastly tried to relock the bootloader which did nothing with the factory reset failing at ~15%.

Erecovery mode doesn't work for this phone due to a failure to get the packets as well...

Now I am just left with a phone with no OS with TWRP installed...

Are there any solutions to installing an OS on this phone to get this phone running? Thanks in advance!

Some additional information:

My phone displayed that its a FRD-L14C567 before installing a custom OS

After installing the custom OS, it displayed that my phone is a FRD-L04

Since I cannot find any free ROM for FRD-L14, I decided to use the ROM for FRD-L04C567 which are the .img files I flashed to the phone.