ATT Firmware on unbranded with BL2? - Samsung Galaxy S8 Questions and Answers

Hi I own an unbranded S8 and want to use it on ATT with VoLTE/HDVoice working. If I want to install the newest ATT firmware on this phone with version 2 of the boot loader, is there anything I should be aware of? Should I update the boot loader with the stock unbranded firmware first and then flash via ODIN to the newest ATT firmware that used boot loader V2? Has anyone tried this?
Also, does anyone know what USERDATA should be used for flashing ATT firmware? The ROMs on updato do not have USERDATA, but I have found a USERDATA from an older ROM, but that is months old now.
Last, I would like to keep my phone unrooted and with KNOX intact.

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[Q] sgh-i337 post OTA update

I have a sgh-i337, I tried to format my rom and threw everything at it but the kitchen sink but could not get it cleared. Then I looked around and found out about the write protect issue on the bootloader from at&t and verizon. (chattr +i /boot/system.tar.md5) It's not difficult to figure out what they did.
Needless to say I am softbricked right now with all the user data deleted. I did back up in kies but it is asking me for a number I never saw.
Is there a patch for fixing the at&t immutable bit on the bootloader?
Is there a download that will help me launch my phonetop?
We know the bootloader and system files are just fine... :silly:
The boot loader is still locked. The stock kernel and recovery cannot be replaced.
The link to stock firmware is available in http://forum.xda-developers.com/showthread.php?t=2616221
You can use Odin to flash the stock firmware. You can flash the same or newer version only.

How to update bootloader, stuck on MG1

I know this is counter intuitive to most people, they usually want to stick with the older bootloader without that KNOX crap.
I want the newest bootloader so I can run the current kernel for 4.4.2, right now my phone is stuck on the MG1 bootloader, which can't run the kernel for this version and I don't have WIFI.
I tried flashing numerous times with ODIN for factory firmware from sammobile. I have an I337M from Canada (Rogers/Bell/Telus)
I can't get OTA to get working again because it thinks I'm on modified system etc, bootloader, even I reflashed everything...
Have you tried a data factory reset from within stock recovery?
BriEE said:
I know this is counter intuitive to most people, they usually want to stick with the older bootloader without that KNOX crap.
I want the newest bootloader so I can run the current kernel for 4.4.2, right now my phone is stuck on the MG1 bootloader, which can't run the kernel for this version and I don't have WIFI.
I tried flashing numerous times with ODIN for factory firmware from sammobile. I have an I337M from Canada (Rogers/Bell/Telus)
I can't get OTA to get working again because it thinks I'm on modified system etc, bootloader, even I reflashed everything...
Click to expand...
Click to collapse
Check here, http://forum.xda-developers.com/showthread.php?t=2269304
Remember your on a I337M, your bootloader is unlocked. Do NOT flash any US-based AT&T firmwares or your end up with a normal locked I337. What version are you trying to flash in Odin? Flashing the MG1 firmware should work, what errors is Odin producing?

[Q] Stuck At Boot Animation From Lollipop Downgrade

Ok so I'd like to put AllianceROM on my international version SM-G900F H3G UK model.
To do so, my plan is to downgrade lollipop to 4.4.2 stock, root with TowelRoot, then install the ROM through Mobile Odin Pro (to preserve the KNOX counter). I've just tried to flash 4.4.2 onto the phone, but I cannot get it to start at all after it's flashed. The phone just hangs on the Three (H3G) boot animation.
I'm hoping that I've just got confused with the Sammobile site and that I've just flashed the wrong 4.4.2 firmware (so far tried flashing ANG2 and ANE2). Something I should have checked earlier but I just thought they were updated versions of the same ROM).
If I can't successfully boot into 4.4.2, I'd like to try flashing lollipop to retrieve some files I forgot to backup (another silly mistake). I'm not sure whether I can take files off it through the ADB sideload or whatever but if I have to lose all my data then I'm not too bothered.
What's the best way to go about my situation?
Any help would be greatly appreciated.
Boot to recovery and factory reset
*Detection* said:
Boot to recovery and factory reset
Click to expand...
Click to collapse
Right, thanks man. After flashing lollipop, I can now boot up and back up stuff. I'll flash 4.2.2 again and factory reset.

Messed up flashing Modem and Bootloader on G900W8 Wind Mobile

So, I wanted to flash a custom ROM like Revolution S5 which runs on 5.1.1 but I was told to flash Lollipop BL and Modem, so I used Odin 3.11.1 and used the BL and CP option to flash the bootloader and the modem at the same time. But when I booted up the device it showed the marshmallow boot animation but never booted up. So, the biggest problem here is there isn't a 6.0.1 firmware for Wind Mobile that isn't on that bs rapidgator site so I can try to fix it. Does anyone have it?
Just to clarify:
Not hard bricked: Can enter recovery and download.
Yes, I tried restoring a nandroid backup to no avail.

help flashing stock firmware galaxy s7 edge telus 935w8

I have downloaded a file for flashing stock firmware from telus with july updates, it contains several files. I have rooted and installed xposed on my stock firmware and I want to get rid of the installed system root and xposed flashes. The only way I can figure is to flash a stock rom back. What do I flash to do this? AP/CSC? seeing as this rom is an update as well I imagine I will have to flash bootloader too. Any advice or general walkthroughs or links would be greatly appreciated.
anyone?
in case anyone finds this I was able to flash and YES it flashes the boot.img and recovery.img but not csc or home. Which I dont really mind at all. When flashing over previous stock rom it upgraded the rom and all my stuff and cleaned out the system too! encryption is back and i can lock the phone, rooted it and was able to still have lock and encryption

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