[Samsung Galaxy S7 Edge Guides, News, & Discussion] BadLegend:
I need to write this somewhere so internet will remember this moment in my life.

Patient: G965F [S9+]

Rescue duration: 14hr with breaks

Status: Resurrected

(If anyone reads this and can answer questions I will highly appreciate your feedback)

I have little to no idea which bad decision caused this but:

I had custom ROM and kernel flashed (AMBASADII 16.3 ROM and White Wolf kernel) all was working fine for few days.

I checked if there is new BOOTLOADER/MODEM UPDATE and there was (U4CSE3 so I flashed it - for my knowledge can I update bootloader/modem without any risk or should I wait for ROM first and then after clean/dirty flash, flash bootloader/modem update?) then if I recall correctly I flashed without reboot other kernel ( ElementalX over White Wolf's custom kernel - is this bad practice and because of that I had problem? ).

After above flashing I reboot and stuck at SAMSUNG loop, so at that time i wipe data (Should I NOT wipe all data and just clean flash it again to replace ElementalX kernel with ROM kernel and wipe did all that mess?) - > yes - > reboot to recovery - > flash rom - > no IMEI, no signal.

I almost cried. <- this is so important that deserves it own line

I had EFS backed up using no longer supported app on PlayStore that other app is now supporting (EFS IMEI Backup now changed to Partitions Backup & Restore but both failed) ( I had.img file so I dd if=/storage/sdcard/efs.img (by the way is EFS on sda3 for S9+?) it but failed) reboot and pray but nothing. I was broken inside (all that took me around 5 hr).

Funny that through googling I have seen your guide 3 times but as it was for S7 i decide not to take risk and try something else.

I failed with Kies, failed with Odin when I tried to flash stock rom.

Then after 12hr of struggle, breaks, sleep, and mental breakdown I decided to find your guide and follow it. But first problem I had was COMBINATION file for G965F, so I have found one on AFH but that one failed unsure why, almost gave up but I google other site (FirmwareX.Net) where I found different version and this one worked in odin and after boot I seen signal back, and IMEI displayed.

Then I just had to buy premium on sam mobile download latest PDA ver (U4 because previously stock ROM i tried to flash was U3CSD4 and as I updated bootloader/modem I thought that this is why it failed to flash through ODIN - right?) for my model, flash it and all was good to go.

Then recovery, custom rom and backup in TWRP - if something like this will happen to me AGAIN will that almost 11GB backup I did i TWRP will let me just simply restore it and this also will restore signal/IMEI/EFS. I have backed up everything that there was possible to backup)

And this is how I have my phone working again.

I don't know how to thank you for this guide, and that I could use it in my case. Without you I couldn't done that.

(I will donate after I get paid promise)

So by now you know already that my knowledge about modems, bootloaders, kernels, csc's ect is little to none. Sorry for all non technical definitions, mistakes and lack of knowledge (that I would love to improve if someone can answer my questions). I'm not native English so please forgive me all grammar mistakes.