[Galaxy S6 Edge Q&A, Help & Troubleshooting] Evangeder:
I'm copy-pasting my own post from Reddit, because it seems that i already wrote everything i could to describe my problem:

<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:0/003> Added!!
<ID:0/003> Odin engine v(ID:3.1101)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Initialzation..
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> SingleDownload.
<ID:0/003> boot.img
<ID:0/003> NAND Write Start!!
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)

I tried almost everything. I can't get PDA/CSC numbers out of the phone because it's bricked, and i can't access android on it.

I tried to flash with those softs:

G925FXXU4DPH9_G925FPRT4DPH9_PRT

G925FXXU5EQF1_G925FPRT5EQDR_PRT

G925FXXU6ERD1_G925FPRT6ERC1_PRT

G925FXXU6ERG1_G925FPRT6ERG1_PRT

G925FXXU5ERB1_G925FXEO5ERB2_XEO

G925FXXU6ERD1_G925FXEO6ERC2_XEO

AP_G925FXXU6ERF5_CL13830439_QB18615592_REV02_user_low_ship_meta

AP_G925FXXU6ERG1_CL13830439_QB18898846_REV02_user_low_ship_meta

Odin versions i have tried:

Odin3_v1.85

Odin3_v3.09

Odin3_v3.10.6

Odin3_v3.10.7

Odin3_v3.11.1

Odin3_v3.12.7

Odin3_v3.13.1

But no luck.

I tried extracting BOOT.IMG file out of those packages and using /tar-Tool/ from XDA Developers to pack it up again. Next, i have put Boot.tar.md5 into AP section of Odin, booted my phone to download mode (held volume down, home and power button until selection screen of restarting or continuing came out, then i've hit volume up). I pressed start button on Odin and it doesn't even try to flash Boot.img file. Other files like sboot.bin are flashable. I am powerless.

Another thing i tried was to use Smart Switch. Any version of it - both old and new ones. But it just says that it's incompatible with my device. I mean, what the hell, the phone ITSELF asks to be emergency recovered using Smart Switch and Smart Switch points middle finger at me saying it's incompatible with SM-G925F...

Download mode top-left corner text:

ODIN MODE
PRODUCT NAME: SM-G925F
CURRENT BINARY: CUSTOM
SYSTEM STATUS: OFFICIAL
REACTIVATION LOCK: OFF
Secure Download : Enabled
KNOX WARRANTY VOID: 0 (0x0000)
RP SWREW: B:6 K:2 S:2

I can't take the phone to the boot menu anymore btw.

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Edit #1:

I have tried unpacking boot.img and repacking it with cygwin and tar-tool for odin. No luck. It's not even going to try to flash the file anymore. I'm getting "FAIL! (DeviceInfo)" at Odin.

I hope i won't be forced to play Chopin's funeral march...

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Edit #2:

Never use Dr.Fone, it's a scam. Good thing that i think with my wallet.

I am now trying to get latest 4 file software using SamFirm, will try to flash with PIT file from CSC

Result:

<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:0/003> Odin engine v(ID:3.1207)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Initialzation..
<ID:0/003> Set PIT file..
<ID:0/003> DO NOT TURN OFF TARGET!!
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> NAND Write Start!!
<ID:0/003> SingleDownload.
<ID:0/003> boot.img
<ID:0/003>
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
<ID:0/003> Removed!!

Whole operation took approx 8 seconds from START to FAIL.

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Edit #3:

I noticed i no longer need to go to Odin download mode in my phone. It's opened by default. It even shows a damn progress bar which gets stuck at approx 40%...

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Edit #4:

Something's flashing! Not what i want tho, but it seems like CSC and CP are flashing. Problem is that BL and AP doesn't want to flash.

<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:0/003> Odin engine v(ID:3.1207)..
<ID:0/003> File analysis..
<ID:0/003> SetupConnection..
<ID:0/003> Removed!!
<ID:0/003> Initialzation..
<ID:0/003> Set PIT file..
<ID:0/003> DO NOT TURN OFF TARGET!!
<ID:0/003> Get PIT for mapping..
<ID:0/003> Firmware update start..
<ID:0/003> NAND Write Start!!
<ID:0/003> SingleDownload.
<ID:0/003> modem.bin
<ID:0/003> Transmission Complete..
<ID:0/003> Now Writing.. Please wait about 2 minutes
<ID:0/003> Receive Response from boot-loader
<OSM> All threads completed. (succeed 0 / failed 1)

Nothing's flashed. that modem.bin file was sent but suddenly it timed out? I have no idea what just happened.

CSC (starting with cache.img) also fails, but it doesn't even completes sending.

<ID:0/003> NAND Write Start!!
<ID:0/003> SingleDownload.
<ID:0/003> cache.img
<ID:0/003> Complete(Write) operation failed.

-----------------

Edit: #5

Samsung support gave me a hint that CSC is Polish PLAY (PRT). It's something.png

I am trying to use Android ToolKit and repacking files separately into flashable .tar files. No luck yet.

Zerolte TWRP still not flashing. Odin 3.10.6.

Recovery mode unavailable.

Phone might have OEM Lock turned on.