Root will not help as it's not needed for using TWRP.
As I've read about loads of people having problems with that app I avoided to install it.
As long as Magisk isn't installed you won't have root.
I've read for other devices that downgrading the bootloader wasn't successful.When I first tried to install a rom using Odin, the error message was Fused 3 > Binary 2 (I think it was Binary 2).
This was before I used BenG7's process.
There is quite some information for troubleshooting available for this error. After some searching my understanding is, that the encryption of the device and some protection implemented with Pie disables the rollback of the Bootloader to an older version.
This is how I ended up here, trying to root the device.
Odin looks like this:
<ID:0/003> Odin engine v(ID:3.1301)..
<ID:0/003> File analysis..
<ID:0/003> Total Binary size: 4457 M
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
One other suggestion:
The last time I was really familiar with rooting and custom roms, things looked white differenty.
It was pretty much Rocovery -> different boot loader -> custom rom.
Now it seems like Odin does it all in one step - or better in one step with several files.
Would it make sense, to focus on getting a different boot loader installed`?
This seemed to be the root cause of the original issue.
Sorry if this is a dumb question.
Looks like the kernel source is fubarred. It's not the first time Sammy source code has been unbootable and it always Qualcomm source code.Ok, just tried the AQB9 Bootloader with your first and second permissive boot.img, but didn't worked. Stucked at first boot logo with the yellow writing in the upper left corner like before. Do you maybe have a AQBB, AQC1 or AQD6 permissive boot.img?
Just to be sure that the error lies in your kernel source, I downgraded the firmware to AQB9. Ended up with the same errors for both permissive boot images like before.
The issue, as I suspected, the kernel version was mismatched to the base firmware on the device.