iank23

Trying to find stock firmware that will work

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Trying to get root, so I am downgrading the firmware, I have had nothing but trouble with it thus far, though. Any help would be appreciated. 

SM-G955U - US Cellular Version

G955USQS3CRE2

Bootloader Version 3

Android 8.0.0

History of the phone, tried rooting quite a while ago, softbricked it, then went back to stock rom no problem. Flash forward a few months later, used the SamFail and PartCyborgRom method to have root, did not have mobile data, though, so I went back to stock, again. I was told after a bit that updating the modem would have fixed that issue, but oh well. Now, I want to use the SamFail mehtod to have root again, and fix the modem issue in the phone. I am trying to downgrade the firmware so that this will work. 

However nothing is working properly.

List of all firmwares I have tried:
USC-G955USQU1AQDE-20170505162155
USC-G955USQU1AQD9-20170421124057
SM-G955U_1_20170504154313_jk5541apkz_fac
SM-G955U_1_20170620081840_8g9ali6ocz_fac
SM-G955U1_1_20170428100826_id2grime7e_fac

I have uninstalled the Samsung Drivers, rebooted and reinstalled, same for ADB. I have enabled USB Debugging. I can not enable OEM Unlock, locked bootloader. 

For the Odin settings I have tried loading just AP. Then All of them. Then everything except for BL. Then all except for CSC.

The options I have checked are Auto Reboot and F. Reset Time.

This is the Odin Log:

<ID:0/004> Odin engine v(ID:3.1301)..
<ID:0/004> File analysis..
<ID:0/004> Total Binary size: 4429 M
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Set PIT file..
<ID:0/004> DO NOT TURN OFF TARGET!!
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> NAND Write Start!! 
<ID:0/004> SingleDownload.
<ID:0/004> boot.img
<ID:0/004> FAIL! (Auth)
<ID:0/004> 
<ID:0/004> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)


This is what it says on my phone in DL mode:

CARRIER: USC
RPMB fuse blown
RPMB PROVISIONED
CURRENT BINARY: Samsung Official
SYSTEM STATUS: Official
FRP LOCK: OFF
WARRANTY VOID: 0x0
QUALCOM SECUREBOOT: ENABLE
RP SWREV: B3(1.1.1.1.1) K2 S3
SECURE DOWNLOAD: ENABLE
DID 205EBC0B1B52
SW REV CHECK FAIL : (boot)Fused 2 > Binary 1


My phone still works just fine, have not bricked it trying all of these. I am open to all suggestions at this point. I know I had the stock firmware at one point in time, and I am trying to find it at any cost.

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