Database Users

Help to get back to AT&T Firmware after flash G935U

Greetings pals i have a really big question, i got a S7 Edge from AT&T (SM-G935A) but i cant update to nougat so i flash the unlocked (SM-G935U) firmware to get Nougat so i just wanna go back to AT&T but i cant via odin i downloaded a lot of firmwares labeled to 935A but when i try to flasg via odin it stucks at File analysis and thats it, also i tried with another (older) version of odin and it gives me a soft brick the main cause i want to go back to AT&T its because i want to try Oreo Beta but im stuck
Any help would be appreciated and if something its wrong with this let me know

SHA256 Invalid error when flashing unlocked firmware to unlocked S8

Hello,
I flashed my factory unlocked Samsung Galaxy S8 with the Verizon carrier firmware awhile back in order to gain some carrier features. Since then I have gotten a new device and want to flash my S8 back to the unlocked firmware. Flashing to the Verizon firmware was uneventful, but trying to flash it back to the factory unlocked XAA U1 firmware always results in a SHA256 Invalid error right after I click Start in Odin. I've tried the Prince Comsy version as suggested on a few threads, but it just gives a failed to write error. I have also tried another firmware version download (from Updato), different versions of Odin, and different PCs.
Any help would be greatly appreciated.
Thanks.

Master_W said:
Hello,
I flashed my factory unlocked Samsung Galaxy S8 with the Verizon carrier firmware awhile back in order to gain some carrier features. Since then I have gotten a new device and want to flash my S8 back to the unlocked firmware. Flashing to the Verizon firmware was uneventful, but trying to flash it back to the factory unlocked XAA U1 firmware always results in a SHA256 Invalid error right after I click Start in Odin. I've tried the Prince Comsy version as suggested on a few threads, but it just gives a failed to write error. I have also tried another firmware version download (from Updato), different versions of Odin, and different PCs.
Any help would be greatly appreciated.
Thanks.
Click to expand...
Click to collapse
thread moved to Q&A

Anyone?

Still haven’t been able to find a fix for this. Tried with a patched version of Odin to bypass the SHA256 check, but it’s giving me a different error. I’ve attached photos of the exact error messages below. Surely someone here knows something about this?

download latest firmware
its maybe because you are flashing old file with v1 bootloader

sahilg009 said:
download latest firmware
its maybe because you are flashing old file with v1 bootloader
Click to expand...
Click to collapse
Already using the latest from Updato. Thanks though.

Still haven’t found a fix for this. Any suggestions would really be appreciated. Not sure what else to try here.

sahilg009 said:
download latest firmware
its maybe because you are flashing old file with v1 bootloader
Click to expand...
Click to collapse
Well, you were pretty close. For anyone who is interested, the issue I’ve discovered is that the current Verizon firmware has bootloader v4 on it, and the latest U1 firmware only goes up to bootloader v3. Looks like I’ll just have to wait it out.

Master_W said:
Hello,
I flashed my factory unlocked Samsung Galaxy S8 with the Verizon carrier firmware awhile back in order to gain some carrier features. Since then I have gotten a new device and want to flash my S8 back to the unlocked firmware. Flashing to the Verizon firmware was uneventful, but trying to flash it back to the factory unlocked XAA U1 firmware always results in a SHA256 Invalid error right after I click Start in Odin. I've tried the Prince Comsy version as suggested on a few threads, but it just gives a failed to write error. I have also tried another firmware version download (from Updato), different versions of Odin, and different PCs.
Any help would be greatly appreciated.
Thanks.
Click to expand...
Click to collapse
Did you fix your problem, if yes - how ?

novosti said:
Did you fix your problem, if yes - how ?
Click to expand...
Click to collapse
Yes, I was getting that error because the unlocked firmware I was trying to flash had an older boot loader than the Verizon firmware that was on the phone. Had to wait until an updated version of the unlocked firmware was uploaded.

Master_W said:
Yes, I was getting that error because the unlocked firmware I was trying to flash had an older boot loader than the Verizon firmware that was on the phone. Had to wait until an updated version of the unlocked firmware was uploaded.
Click to expand...
Click to collapse
How to check what version of boot loader is on the phone.
and what version is on firmware ?
thank you

novosti said:
How to check what version of boot loader is on the phone.
and what version is on firmware ?
thank you
Click to expand...
Click to collapse
I don’t quite remember, I sold that phone soon afterwards. It has something to do with the name of the firmware, I’m sure Google could help you there.

Flashing SM-G935U ATT Firmware onto AT&T S7 Edge with Oreo

Hi,
I am trying to flash my SM-G935A AT&T S7 Edge (not carrier unlocked) with the new SM-G935U firmware (G935UUES4CRG3/G935UOYM4CRG3/G935UUES4CRG3/G935UUES4CRG3) that I dowloaded for my US AT&T S7 Edge. I upgraded my S7 Edge to the latest Oreo firmware via OTA around a month ago.
I used SamFirm to download the image to flash. Anyhow, even though I put every file into its respective category on Odin 3.13.1, I get an "SHA256" mismatch error. I've seen some instruction that say to only add the AP file onto Odin and others say to use the prince cosmey version of Odin. What could be the problem? Does the phone need to be carrier unlocked? Is my firmware too new or of the same version? Do I need to use the prince cosmey version? Is it not possible to flash the g935u firmware onto a g935a phone? Should I use another download source? Should I use the slightly older G2 firmware? Anything else I should consider?
Also, I noticed that I could not download firmware for the SM-G935A using the ATT code with SamFirm? Any reason as to why?
I realize that there are many other threads that touch upon this problem but they are either with a different edition of the phone, firmware version or some other variant. I'm posting a new thread because I want to be as thorough as possible and make sure not to brick my phone by receiving safe advice before moving forward. Thank you for your time!
Below are the SamFirm download details:
SamFirm v0.3.6.0
Checking firmware for SM-G935U/ATT/G935UUES4CRG3/G935UOYM4CRG3/G935UUES4CRG3/G935UUES4CRG3
Model: SM-G935U
Version: G935UUES4CRG3/G935UOYM4CRG3/G935UUES4CRG3/G935UUES4CRG3
OS: Oreo(Android 8.0.0)
Filename: SM-G935U_2_20180802135240_rnnvd1mwvs_fac.zip.enc4
Size: 3125412480 bytes
LogicValue: ympm9uc708lgw7kk

Correct Thread?
Did I post in the wrong thread or something? Is that why there is no response? Would someone be kind enought to point me in the right direction if this isn't the right section for such a question?
Thank You

Hi did you find any answers to this issue? i got stuck on same point as you...

Stock Odin checks the version on the device and fails because the U version doesn't match the A version you are "upgrading". There are patched versions of Odin that skip this check, and that is what you need to do a cross-carrier upload.

Exfirexs said:
Hi did you find any answers to this issue? i got stuck on same point as you...
Click to expand...
Click to collapse
Use a patched odin to flash the firmware, it will go through.

0x0null said:
Use a patched odin to flash the firmware, it will go through.
Click to expand...
Click to collapse
Hi, yes it worked!

Samsung Galaxy S7 Edge problem with custom and stock ROM

Hey guys, I have a problem and I need your help... Yesterday I flashed via Odin3 UK official stock rom on Samsung Galaxy S7 Edge (Android 8.0)... Everything worked okay, did some updates through the phone... I saw that Samsung Health app doesn’t work because it said that software was modified... So I searched YouTube and found that I need to root the phone... So I downloaded TWRP recovery 3.2.3... I flashed it via Odin3 without any problems... I downloaded custom unofficial Samsung rom (Android 8.0 by Jays)... it works well, Samsung Health app works also... it has latest patch from January 2018... but the phone can’t get official updates via OTA... so I decided to get back to stock official rom from Samsung... I downloaded 3 different roms with different country(Android 8.0) but every I try to flash via Odin3 fail... I don’t know why but I can’t flash it... The binary of phone was firstly custom then it changed after trying to flash to Samsung Official and system says custom... TWRP is missing there now and anything I can do is get to download mode... One important thing which I saw is: RP SWREV (B:3, K:1, S:2)... also when I try to flash the phone says under this: SW REV CHECK FAIL(BOOTLOADER): Device: 3, Binary:2... I tried different AP in Odin3 but still without changes (also saw Kernel fail: Device:1, Binary:0)... I want to get the phone right on official firmware... I hope it’s not bricked... Any tips or help will be appreciated (I read a lot of posts here but nothing help)...

Hi.
You can only flash roms that have the same bootloader version as your phone or higher.*Downgrading is not possible .
Go to Sammobile and search for the latest Firmware of your device ,download and flash it via Odin.
Good luck

Yep, search latest firmware with same binary your binary is B3 and you cannt flash any old firmware like B2 or B1

coiuld anyone please help me find the correct stock firmware, bricked phone.

my galaxy s8 sm g950f is bricked, installed twrp but it keeps giving unable to mount preload, invalid argument when trying to format so i could root, now i acidently deleted the os and it currently has no os on it, tried flashing what i thought was correct stock firmware but it gets confusing, i brought it on ebay, its locked to vodaphone. from united kingdom. if anyone could direct me to latest stock firmware id be very greatfull, i was using latest firmware before this happened which was andoid one or pie ?

morgan1985 said:
my galaxy s8 sm g950f is bricked, installed twrp but it keeps giving unable to mount preload, invalid argument when trying to format so i could root, now i acidently deleted the os and it currently has no os on it, tried flashing what i thought was correct stock firmware but it gets confusing, i brought it on ebay, its locked to vodaphone. from united kingdom. if anyone could direct me to latest stock firmware id be very greatfull, i was using latest firmware before this happened which was andoid one or pie ?
Click to expand...
Click to collapse
here ya go mate
https://www.sammobile.com/samsung/galaxy-s8/firmware/SM-G950F/VOD/download/G950FXXS5DSI6/292990/
use the frija tool or samfirm to download it. takes 1/4th the time as sammobile throttles like s#it

Thanks mate, yeah it was a rite pain in the ass waiting, but I did get the correct firmware, turns out I needed the btu version, now I'd only I could get root access.
Will bookmark that.