[AT&T Samsung Galaxy S7 Edge Questions & Answers] Leomacomp:
Hey folks, not quite sure where to turn from here or if this phone just goes to the dump...I was looking originally to unlock the AT&T S7 Edge I have and give it to a coworker who is on Verizon. Come to find this is a much larger task than I anticipated.

Device info: Galaxy S7 Edge AT&T SM-G935A

I attempted to follow the guide which started here: https://xdaforums.com/verizon-s7-edge/how-to/odin-stock-nougat-firmware-t3570156

I downloaded the Samsung drivers, Odin v3.12.3 Patched, and the corresponding VZW firmware which I was under the impression was correct, from https://updato.com

I loaded Odin and the phone, ran the installer, and it looked kosher. The device passed, and it began to reboot. However, after that, it got stuck in the nightmare of recurring boot. I entered recovery mode, cleared cache and tried doing a factory reset, to no avail. Device keeps rebooting. Tried re-flashing firmware, no luck.

Where I got to:

On the downloading screen on the Edge:

ODIN MODE (HIGH SPEED)

PRODUCT NAME: SM-6935U <- (this seems wrong given it was AT&T, but I could be misinterpreting as I requested to have the device unlocked from AT&T and the person attempted activating on Verizon before all this)

CURRENT BINARY: SAMSUNG OFFICIAL

SYSTEM STATUS: OFFICIAL

WARRANTY VOID: 0X0

QUALCOMM SECUREBOOT: ENABLE

RP SWREV: B8(2,1,1,1,1) K8 K8

SECURE DOWNLOAD: ENABLE

If I attempted to rerun any of the dozen or so firmware versions I've tried, I always got the following two errors:

In Odin:

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<ID:0/005> Added!!

<ID:0/005> Odin engine v(ID:3.1203)..

<ID:0/005> File analysis..

<ID:0/005> SetupConnection..

<ID:0/005> Initialzation..

<ID:0/005> Set PIT file..

<ID:0/005> DO NOT TURN OFF TARGET!!

<ID:0/005> Get PIT for mapping..

<ID:0/005> Firmware update start..

<ID:0/005> SingleDownload.

<ID:0/005> emmc_appsboot.mbn

<ID:0/005> lksecapp.mbn

<ID:0/005> FAIL! (Auth)

<ID:0/005>

<ID:0/005> Complete(Write) operation failed.

<OSM> All threads completed. (succeed 0 / failed 1)

On the device:

SW REV CHECK FAIL : [aboot] Fused 8 > Binary 4

After several hours I managed to get the phone semi-working.

I installed the G935UUEU8CRJ2 firmware from the web. It's the only one it would take as far as I can tell.

However there are two issues:

1. The device keeps restarting after 1-2 minutes of being powered on.

2. The firmware seems to be somehow Sprint? That doesn't make sense...

Android version: 9.0.0

Samsung Experience version: 9.0

Baseband version: G935UUEU8CRJ2

Kernel version: 3.18.71-13710210

Build number: R16NW.G935UUEU8CRJ2

Knox version: 3.1

I've tried running the factory reset from the GUI, but that didn't fix the restarting. Using the reset cache and factory wipe also did not fix the issue. Furthermore when booting into recovery mode initially it attempts to do a system update, then up pops the dead android with x's for eyes and the notorious yellow triangle, yet I can still access recovery mode after a few seconds.

Any suggestions?