[Samsung Galaxy Note 8 ROMs, Kernels, Recoveries, &] BigCountry907:
Exynos Note8 and Snapdragon Note8 are different processor.

This is for N950U only. (Snapdragon)

The sdcard method will not work on these. It used to work on emmc devices.

This device has UFS memory that is provisioned to 4 disk.

Sdcard is not the priority boot. You can put partitions on the sd card and some will have effect but i never got anywhere with this.

You can't downgrade the bootloader at all as far as i know.

Even if the entire ufs is erased.

The bootloader rev is blow in into fuses in the processor. (Thats the RPMB Provisioned )

I may try a downgrade just for the heck of it. But i don't think it'll work. It will most likely cause a brick.

Edl is easy if you have a booting device and can adb reboot edl.

But after that if you brick then you have to take the whole phone apart.

The only way to get a brick into edl is using the test point.

You have to take the main board completly out of the device.

The test point is on the side that is up against the back of the screen.

Peel the black sticker off the top of the big shield.

There is a small split in the shield in between the two chips.

You need a 10X magnifying glass to see in there. Things are super micro small.

You will see resistors and capacitors. The little rectangle things.

There is a tiny tiny smaller than the rest resistor in the center of the area. Stay away from it.

On one side you will see 2 little dots that are exposed.

That is not the right point.

On the opposite side right in front of the resistor where you see no circles and towards the edge of the chip you have to very gently scrape the board with a flat screwdriver. You will notice about 4 or so more little circles showing now.

You have to use the magnifying glass to see them at all.

The very first circle right in front of the resistor is the test point.

Use a needle with a wire soldered to the eye.

Connect the loose end of the wire to any metal shield. Take the stickers off.

Then put pinpoint on the testpoint and plug the usb into the computer.

I plug the usb into the board first.

Then i put the pin point on the test point using a indicator stand that i have.

Like this.

https://www.amazon.com/KHCRAFT-Magn..._8?s=industrial&ie=UTF8&qid=1546108778&sr=1-8

You put the needle in the black holder part of the stand. You might be able to do it by hand. But the stand makes it easier.

The point you have to get on is about the size of the needlepoint.

Here is a pic of the test point.

If this place will show it right. I always have bad luck with pics.

Note that there will be a metal shield covering the chips so you wont see the chips.

Look in the gap in the shield that's where the point is.

Look at the resistors with the magnifying glass to figure out the right place.

The resistors are arranged different on each side and that's how to tell what side your on.

The side where 2 resistors are turned up and down is the right side.

All the resistors go sideways or across on the other side.

Only one side has 2 resistors that are up and down orientation.

Its a little tricky.

But just get the pinpoint on the testpoint. I tape the wire to the metal shield for ground.

Once its connected then plug it in. Dont plug it in before you have the point shorted.

If you missed it and no edl then unplug move your needle and try again.

Took me a while the first time.

If you have a really good magnifying glass it will be very helpful.

A microscope even better.