DON'T FORGET TO ENABLE "OEM UNLOCK" (located in Developers options)
KNOX will be tripped once you flash custom binaries to your phone. Your warranty may be voided. However this may not affect you if your country forces Samsung to provide hardware warranty regardless of software status
Samsung Firmware OTA (aka System Updates) will no longer work once you flash custom binaries. You can flash custom ROMs if you want to keep the OS up-to-date
All apps that use KNOX like Samsung Pay, Secure Folder and maybe more will no longer work
Good news everyone!
I finally have a working build with a proper fix!
I was so wrong and this all hapened because Samsung has decided to finally fix in their firmware files the name of the SoC that our devices has. So, due to this, exynos7885 is no longer mentioned but instead it is exynos7904. This name change affected some filenames in the kernel, boot and recovery. One of the examples is the fstab as @tys0n correctly mentioned. The file that exports the ANDROID_ROOT variable was also affected and this was the main problem.
Go grab the new builds in the OP! The Multidisabler zip is also fixed as now we will be using ianmacd's version.
I made a file with TWRP + boot.img + vbmeta for the step 7, so if someone is interested, you can download it here .
Just flash it with Odin in AP slot.
Please make sure you are on the latest firmware (CUD3)
this is what i did ... create a tar file with twrp, boot and vbmeta inside.
Go to Settings >> About phone >> Software version and then tap the build number for about 10 times to enable developer mode. Once enabled, you will see the message "You are now a developer" on the screen.
Go back to the main Settings screen and look for Developer Options. Inside you will find OEM unlocking and USB debugging. Enable both options by tapping the switch.
Now turn off your smartphone and start the download mode. You can do this by pressing the Volume Up and Volume Down buttons simultaneously for a couple of seconds.
Note: While using the above combination, you need to connect your device to your computer via the USB cable.
Another note: make sure all necessary drivers are already installed on your computer. If not, the desktop will not detect the smartphone.
After step 3, you should now be able to see the download mode with a large warning text written at the top of the screen.
Now, long press the Volume Up button to unlock the device bootloader. You will now be redirected to a confirmation screen. Press Volume Up to proceed with the unlock mode.
Your smartphone will restart and a Bootloader unlock message will appear on the screen. Acknowledge it and continue further by pressing the power key.
Note: All your data will now be deleted. Hopefully, you've followed our tip and created a full backup.
You will now see the device setup screen. Complete it without linking any Google or Samsung account. You can also skip installing the app.
Once you are on the home screen, enable Developer Options as mentioned in step 1 of the guide.
Now open developer options and look for OEM unlock. The option should be disabled
Make sure the USB Debugging option is enabled on your smartphone.
Download the Odin software and extract it to your computer. You should now be able to see the Odin Exe file after extraction. Run it as an administrator.
Note: You may receive a popup related to ADB drivers. Let the update process finish automatically.
Now restart your phone in download mode and while doing this connect your smartphone to the desktop. You can follow step 3 of the Unlock Bootloader guide to do that.
Once the phone is connected to the computer and is in Download mode, you will be able to see the blue mark on the Odin software. This means that the software has detected your smartphone.
add the previously created .Tar file to the Odin software by pressing the AP button.
Note: Make sure Re-Partition and Auto Reboot is unchecked. You can find it in the options menu.
Now, hit the Start button to start the flashing process. This will take a couple of seconds so that you can sit back and relax.
Once the whole flashing process is complete, you will see the Pass message on the screen somewhere.
How to exit download mode and enter TWRP recovery?
To exit download mode and access TWRP recovery, you can hold down the Volume Down and Power keys simultaneously. When the screen goes blank for a few seconds, ...you need to release the Volume Down key and then quickly switch to the Volume Up button. When TWRP recovery appears, you can release all keys at the same time.
Once you are inside TWRP recovery, go to the Wipe option and then tap on the Format Data option. Type Yes to continue.
Once the deletion is finished, go back to the main menu in TWRP recovery and tap the Restart button.
Within the Restart option, tap on the Recovery option. This will reboot you into custom recovery.
Now you need to install the multidisabler file using the Install option. Once the file has been updated, you can restart your smartphone.
Note: You need to flash the Multidisabler file using TWRP recovery.