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[ROOT][SNAPDRAGON] SamFAIL for Galaxy Note8

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By me2151, Senior Member on 8th October 2017, 12:39 AM
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Root for the USA Snapdragon Samsung Galaxy Note 8! (N950U)

Disclaimer 1: Although this method does not trip the "Knox Flag" you are still taking a risk by rooting your device. We are not responsible for your blazing fast smartphone with root! Let's hope this one doesn't catch on fire!

First and foremost, SHOUTOUTS!
- @partcyborg for finding the root method!
- @me2151 for testing on Note 8 and facilitating root on the Note 8!
- @elliwigy for... Shenanigans! And thread template
- @Chainfire He will be missed! (no he is not dead, just retired.)
- @samsung for the amazing phone and leaving rediculous loopholes open for us to root!

Disclaimer 2: The method to root should be pretty straight forward as the hard work has already been done for you. With that being said, you will need to know how to download files from the internet, extract a zip file and to use ODIN. That is basically it! Oh yea, BACK UP YOUR INTERNAL STORAGE AS THIS WILL ERASE IT! PLEASE BE SURE TO READ ALL THE INSTRUCTIONS THOROUGHLY BEFORE ASKING FOR HELP!

- SamFAIL Note 8 Pre-Rooted System.tar/PIT File Zip (in Post #2)
- SamFAIL Note 8 PART 2 Firmware Zip (also in Post #2)
- Comsey ODIN and Normal ODIN (Found in Post #2 Aswell)(Normal ODIN is just in case)
- Well your Note 8 of course, Need to be by a PC and ready to use Download Mode!
- The CSC file for your phone(also in Post #2)(NOTE: You MUST use the CSC matching your device or your network will not function correctly. If your CSC is not in the downloads section you must download your devices firmware and extract the CSC from it and use that one.)
- fsck.ext4 for fixing system afterward.(Post #2)

Part 1 Instructions:

1) Unzip the SamFAIL Note 8 Pre-Rooted System.tar and PIT File to your PC.
2) Have Comsey ODIN up and ready. Place your Note 8 into Download Mode and Connect to PC
3) In the AP slot, select the Pre-Rooted system.tar.
4) Now go to the PIT tab(Click OK or close on the warning box) and click and navigate to the PIT file you also just downloaded and select it.

5) On the OPTIONS tab, you will select the following: Auto Reboot, F. Reset Time, NAND ERASE ALL, and Re-Partition.
6) Once you have everything in place and the correct options selected, press START.
7) ODIN will say FAIL at the end of the flash. Don't fret however, the system should have still been written!

8) You will have to get the phone back into Download mode( Hold Power, VOL- and bixby together and the phone will reboot to upload mode(or download mode, one or the other) then Release and hold the same buttons and it will load to download mode And tell you its in emergency mode. THIS IS NORMAL.) and then proceed to Part 2 Instructions!

Basic ODIN flashing here guys... Not rocket science!

Part 2 Instructions:

1) Download and Extract the SamFAIL Note 8 Part 2 Firmware Zip and your CSC to your PC
2) Click Reset in Comsey ODIN or close it out and re-open it so it is COMPLETELY cleared out
3) Now select the firmware. BL goes in BL, AP goes in AP, CP goes in CP and CSC goes in CSC, dont press start yet!
4) Now, this time we ARE NOT SELECTING A PIT FILE, We should just select Auto Reboot and F. Reset Time. DO NOT DO NAND ERASE ALL OR YOU WILL HAVE TO START OVER.

5) Once you got the partitions in place and the right options selected, Press Start!

6) The phone will reboot to recovery. THIS IS WHERE THE ONLY ISSUE WILL HAPPEN. If you see ANYWHERE ON THE SCREEN "Failed to mount /system(Invalid Argument)" You need to start over from the beginning, but you SHOULDN'T get the error if you followed the directions properly(There are a couple ways to do this. If you have to try again try flashing the BL and the System with the same flags HOWEVER add the Flash bootloader update flag too. then for step 2 only flash the ap,cp and csc with the same flags then also add the flash bootloader update flag.). From there push the power button to select "Reboot to system".
7) Once phone boots up, Setup your device as normal and proceed to the SuperSU app. It will ask you to update the SU Binary. Select Normal method and let it do its thing. A popup should show up to disable KNOX. Follow its instructions then SU should say it was Successful in updating and it needs to reboot(You may have to do it multiple times. I believe its 2 or 3 times then its good) ENJOY SamFAIL ROOT!

* Boot.img is SECURE which means you MUST use SYSTEM ROOT. (Similar to SamPWND)
* This means that MAGISK DOES NOT WORK
* Which also means SAFETY NET FAILS. So any apps you enjoy that require passing Safety Net will most likely not work while you are rooted with SamFAIL
* Again, similar to SamPWND, this root method uses a factory binary boot.img which is necessary to boot the modified system. THIS MEANS BATTERY ONLY CHARGES TO 80% (Thanks Samsung.)
* This *should* in theory, work for other Snapdragon Models of the Note 8. If you have another model and are successful please post so we can add "support" for other models.

Back to Stock?
- Download the full STOCK firmware of your choice.
- Flash it in ODIN/Comsey ODIN as you would any other time!
- It will take a few reboots for the "custom" splash screen to go away.

- Due to the nature of this "exploit" the system partition is not closed during install. To fix any possible issues add the fsck.ext4 file to the /tmp/ directory using adb and run it by typing
chmod 755 /tmp/fsck.ext4
mount -o ro,remount /system
/tmp/fsck.ext4 -f $(find /dev -name system)
When asked to Salvage hit Y then Hit A to auto repair
- Screen sometimes will be bugged out. Fix by turning screen off and back on. Caused by Factory boot files.
- SuperSU will ask you to update it multiple times.

As always, the devs have been hard at work recently to bring you root. Donations are definitely NOT REQUIRED but if you feel generous and want to spot the devs a few bucks for their hard work you can donate to this Paypal Address:


DOWNLOADS will be in POST #2

As always, ENJOY ROOT and thank SamFAIL for making it all possible!

Telegram links:
Telegram Questions and Answers with Devs @partcyborg and I will be answering questions here and not in the threads.)
General Note 8 talk(Do not ask root questions here)

P.S. See why we called it SamFAIL now? Massive fail on Samsungs part.

XDA:DevDB Information
SamFAIL, Tool/Utility for the Samsung Galaxy Note 8 (2017 Phone)

me2151, partcyborg, elliwigy

Version Information
Status: Beta

Created 2017-10-08
Last Updated 2017-10-07
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8th October 2017, 12:39 AM |#2  
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Main files:


Sprint CSC
T-Mobile CSC
USCellular CSC
Verizon CSC
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8th October 2017, 12:39 AM |#3  
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AT&T Users: If you have working data and texting but cannot make or receive calls go to settings then do a search for mobile networks. Inside of mobine networks select enhanced LTE and uncheck the option inside. Then reboot.
I have figured out why VoLTE is enabled on sprint when the carrier does not support. Its SMS over IP. Its an IMS setting that sprint sets and i guess it normally doesnt have the icon show for that(then again I have not tested it on on stock to see if its enabled there or not). But I would recommend leaving it alone and using something like systemui tuner to hide it. The Hurricane Icon is RCS and the VoLTE is ims_volte. Should be the same for all devices. In my case I can confirm that VOICE over ip is still not enabled.

Mini Update#3:
If you get stuck on checking for updates push the back arrow at the bottom left then push next. You will get stuck on the next part too probably in which you do a normal reboot then you can setup the device like normal.
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8th October 2017, 12:47 AM |#4  
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8th October 2017, 12:51 AM |#5  
bajasur's Avatar
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Nice work gents.

Sent from my SM-N950U1 using XDA-Developers Legacy app
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8th October 2017, 12:53 AM |#6  
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Good Job Guys!! Another Glorious Day!!
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8th October 2017, 12:56 AM |#7  
louforgiveno's Avatar
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Nice job fellas !!

Here's a copy of air command apk

Copy apk to /system/app create a folder named the same as the .apk file, set permissions for folder and set permissions for apk, then restart.
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8th October 2017, 12:57 AM |#8  
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Awesome work! Now to get some stuff working

Sent from my SM-N950U using Tapatalk
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8th October 2017, 12:57 AM |#9  
mkfryan's Avatar
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Nicely done! Thanks for posting!
8th October 2017, 12:57 AM |#10  
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Thank you so much ! Love you all <3

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8th October 2017, 01:01 AM |#11  
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Great work for a great team...thank you all!
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