Related
OK, no matter what method I try I am unable to achieve a successful flash of my phone. I have tried it via odin with many different firmware versions but all seem to fail almost immediately. The only way to resolve this is to use samsung switch and reset phone to stock. The problem is stock firmware is german vodafone full of vodafone bloatware, I want to get rid of it and flash a UK unbranded firmware but no matter what I do I am unable to achieve this. I can see from the forum that there are many people out there with the same flashing problem but with no real responses on how to achieve the goal. There must be people out there that have achieved this task but don't seem to be offering up much help?
ok
sinbrad said:
OK, no matter what method I try I am unable to achieve a successful flash of my phone. I have tried it via odin with many different firmware versions but all seem to fail almost immediately. The only way to resolve this is to use samsung switch and reset phone to stock. The problem is stock firmware is german vodafone full of vodafone bloatware, I want to get rid of it and flash a UK unbranded firmware but no matter what I do I am unable to achieve this. I can see from the forum that there are many people out there with the same flashing problem but with no real responses on how to achieve the goal. There must be people out there that have achieved this task but don't seem to be offering up much help?
Click to expand...
Click to collapse
Is your phone international unlocked out of the box? I dont believe it was, because as far as I've read international unlocked phones come with "unbranded" firmware. The unlocked ones I know can be pretty much flashed with "any" international firmware, which is what you are trying to do.
If you dont know for sure. Odin the stock German Vodaphone. Let the phone boot. Boot back to stock recovery, then factory reset and clear cache.
Then let the phone boot...Download phone info app by vndnguyen (free version is fine)...Open the app, go to CSC Code tab. Then that will tell you the active CSC code and your firmware CSC code...you are looking for the line that says Available CSC Codes. If it only lists German Vodaphone (VD2), then I believe you are stuck til the phone is unlocked.
Anyone, jump in here if I'm mistaken. I am using this as reference as, I've checked my G920F. Mine is unlocked tho and I can flash any firmware from any region with no problem. Hopefully I've answered your question.
I had no luck with the firmwares on the firmware page either.
If you are on OI9 check http://forum.xda-developers.com/galaxy-s6/general/guide-android-6-0-marshmallow-beta-how-t3277533
And try flashing the first stock firmware https://drive.google.com/folderview...sharing&tid=0B40ItdHKfkyQd1hJQXVDU3dDU2c#list (not the android M one!) via ODIN.
Basic process is:
Download the above file, extract, there should be 4 files inside (AP,BL,CP,CSC), simply select each one to go in the relevant box on ODIN, then go into download mode on your phone and click start...
N.B. Be aware that the above firmware contains a PIT file which will reformat and resize the partitions on your phone, so make sure you have a copy of the stock firmware that works before trying the flash (i.e. the one which Smart Switch downloads). You can grab it from your windows %TEMP% directory during the smart switch download (it first downloads a file to TMPxxx, then extracts it into a directory of the same name, its these files you want. They should be the four files beginning with the type of ODIN file you are flashing (AP,BL,CP,CSC). The files get deleted after the firmware has flashed so make sure you watch the process. If things go wrong you can re-flash these files via ODIN
As far as I was led to believe and when I purchased the phone it did state factory unlocked. I was able to put in any sim when I received it and didn't have to go through any aftermarket unlock process?
I have the same problem i have a unlocked G-920F with egyptian CSC and firmware 5.1.1 .when i try to flash BTU 5.1.1 via odin, i have the same problem and only way to recover is via smart switch.BTU firmware is from sammobile
abdussamad said:
I have the same problem i have a unlocked G-920F with egyptian CSC and firmware 5.1.1 .when i try to flash BTU 5.1.1 via odin, i have the same problem and only way to recover is via smart switch.BTU firmware is from sammobile
Click to expand...
Click to collapse
So, seems this is not uncommon?
ok the way to do it is download this file
https://drive.google.com/folderview...sharing&tid=0B40ItdHKfkyQd1hJQXVDU3dDU2c#list
its BTU firmware of 5.1.1
and flash this firmware you'll have 4 files AP,BL,CP,CSC,put it in the respective boxes in odin.I have tested this right now and it works
Press "thanks" if i have helped
Well downloaded the app for CSC info and it states available CSC codes are...
ATL, AVF, CNX, CYV, MOB, MTL, OMN, SIM, SWC, TCL, VD2, VDC, VDF, VDH, VDI, VGR, VIP & VOD
Any ideas?
Ok, tried to get stock firmware when samsung smart switch was downloading and installing but couldn't see where the firmware was being downloaded to? Tried windows temp etc but nothing appeared during download and install?
sinbrad said:
Ok, tried to get stock firmware when samsung smart switch was downloading and installing but couldn't see where the firmware was being downloaded to? Tried windows temp etc but nothing appeared during download and install?
Click to expand...
Click to collapse
Just type in %TEMP% into you windows explorer address bar and it will take you there. arrange by date modified and you will see the size ticking up during the download, before the flash starts it will extract into a folder with the same name, the md5 files can be grabbed from there
No probs here
abdussamad said:
I have the same problem i have a unlocked G-920F with egyptian CSC and firmware 5.1.1 .when i try to flash BTU 5.1.1 via odin, i have the same problem and only way to recover is via smart switch.BTU firmware is from sammobile
Click to expand...
Click to collapse
I flashed BTU firmware on my 920F international unlocked that came with UAE firmware without any problems. Idk
sd_N said:
I flashed BTU firmware on my 920F international unlocked that came with UAE firmware without any problems. Idk
Click to expand...
Click to collapse
Which file and which method?
aaronjp said:
Just type in %TEMP% into you windows explorer address bar and it will take you there. arrange by date modified and you will see the size ticking up during the download, before the flash starts it will extract into a folder with the same name, the md5 files can be grabbed from there
Click to expand...
Click to collapse
Ok, Got it this time, all four files. Will give the method above a go and if it fails at least I've got the stock firmware to fall back on?
Magic, have had great success. Now on the BTU firmware and everything is up and running. Got the stock as well just in case but if this continues to work won't be reinstalling stock. So a big thanks to those who helped
sinbrad said:
Magic, have had great success. Now on the BTU firmware and everything is up and running. Got the stock as well just in case but if this continues to work won't be reinstalling stock. So a big thanks to those who helped
Click to expand...
Click to collapse
Glad you are sorted
Hi, I recently tried to get my phone unlocked. I watched the guy do it, he flashed an older modem and then flashed a UAE firmware.
My original is O2 UK, and I'd like to revert to this firmware as the About Device section shows up with Unted Arab Emirates and the mobile networks section shows LTE rather than 4G.
I have tried flashing the latest revision of the O2 stock rom and odin fails attempting to write sboot.bin with the error message SW Rev. fail (I don't recall the exact numbers after this) appearing on the phone.
I am guessing this is the secure boot loader, which I am aware you can't downgrade, but is there any way of flashing this stock rom since I know it is compatible with the phone?
Try to flash G920FXXU5DQA7 (CSC code:BTU)
chemeleon said:
Hi, I recently tried to get my phone unlocked. I watched the guy do it, he flashed an older modem and then flashed a UAE firmware.
My original is O2 UK, and I'd like to revert to this firmware as the About Device section shows up with Unted Arab Emirates and the mobile networks section shows LTE rather than 4G.
I have tried flashing the latest revision of the O2 stock rom and odin fails attempting to write sboot.bin with the error message SW Rev. fail (I don't recall the exact numbers after this) appearing on the phone.
I am guessing this is the secure boot loader, which I am aware you can't downgrade, but is there any way of flashing this stock rom since I know it is compatible with the phone?
Click to expand...
Click to collapse
You could possibly use smartswitch if you have the serial number of the phone which would download the default firmware that the phone came with if odin fails again
Yes i agree, smartswitch could be your best option.
Thanks for the suggestions. Tried Smart Switch, same error. It appears on the phone as sw rev. check fail.
What exactly is the problem here? Is it that the installed firmware has a newer bootloader than the most recent O2 firmware? In which case is there any way around it?
chemeleon said:
Thanks for the suggestions. Tried Smart Switch, same error. It appears on the phone as sw rev. check fail.
What exactly is the problem here? Is it that the installed firmware has a newer bootloader than the most recent O2 firmware? In which case is there any way around it?
Click to expand...
Click to collapse
Yeah looks like this is a bootloader issue, it won't let you install a firmware which contains an older bootloader, only thing I can is to download the latest non branded UK firmware and see if that flashes.
I'm getting this error too with Device 4 Binary 3 but i didn't find the right firmware yet
I hope in Nougat release
chemeleon said:
Thanks for the suggestions. Tried Smart Switch, same error. It appears on the phone as sw rev. check fail.
What exactly is the problem here? Is it that the installed firmware has a newer bootloader than the most recent O2 firmware? In which case is there any way around it?
Click to expand...
Click to collapse
LollosoSi said:
I'm getting this error too with Device 4 Binary 3 but i didn't find the right firmware yet
I hope in Nougat release
Click to expand...
Click to collapse
As I said before;
Try to flash G920FXXU5DQA7 (CSC code:BTU)
forumber2 said:
As I said before;
Try to flash G920FXXU5DQA7 (CSC code:BTU)
Click to expand...
Click to collapse
Sammobile is under maintenance right now and there are no mirrors reasonably fast... 8 hours for a download.
Anyway update is coming these weeks, I'll wait
LollosoSi said:
Sammobile is under maintenance right now and there are no mirrors reasonably fast... 8 hours for a download.
Anyway update is coming these weeks, I'll wait
Click to expand...
Click to collapse
You could try using samfirm which a windows application which downloads samsung firmwares
LollosoSi said:
Sammobile is under maintenance right now and there are no mirrors reasonably fast... 8 hours for a download.
Anyway update is coming these weeks, I'll wait
Click to expand...
Click to collapse
As @sofir786 said, you can use SamFirm;
https://forum.xda-developers.com/attachment.php?attachmentid=3803841&d=1467715462
When you open it, set the settings like this;
sofir786 said:
You could try using samfirm which a windows application which downloads samsung firmwares
Click to expand...
Click to collapse
Wow I didn't know, it works thanks
forumber2 said:
As I said before; Try to flash G920FXXU5DQA7 (CSC code:BTU)
Click to expand...
Click to collapse
I'll try flashing when the download finishes
Edit:
WORKING!
I used last(I think) ITV
File names:
AP: AP_G920FXXU5DQA7_CL8821257_QB12271362_REV02_user_low_ship.tar
CSC: CSC_ITV_G920FITV5DQA2_CL10387678_QB12242913_REV02_user_low_ship.tar
BL: BL_G920FXXU5DQA7_CL8821257_QB12271362_REV02_user_low_ship.tar
CP: CP_G920FXXU5DPL3_CL8821257_QB11771442_REV02_user_low_ship.tar
Samsung updated their bootloaders to 4XX in September/October so you cant flash back an older one or downgrade,so the only solution you have is to flash the new one which is 5XX released this year.
Flashed the latest UK revision (not the O2 branded one) and it worked
chemeleon said:
Flashed the latest UK revision (not the O2 branded one) and it worked
Click to expand...
Click to collapse
Told you
Hi,
I do have an unlocked version of Samsung Galaxy S7; model SM-G930F(international model), which I brought from Jet.com. I am using T-mobile sim prepaid sim on it.
For the past few weeks its showing problem of re-starting and hangs on Samsung boot screen(first screen with Samsung name and galaxy s7 logo) with blue light on top always on. I tried factory reset, but did not work and happens too often these days. There is no fixed way of getting out of it. Sometimes it works by clearing the cache, at times by logging in on safe mode and rebooting, then at times by charging for a while and turning it on etc...
From looking into the forums and discussion, I have the feeling that its related to bootloop or bricked phone. The only thing left to do is install firmware once again with ODIN. But I am confused on which firmware to download. Can anyone help me with which is the best one to install? Below is the phone details.
AP : G930FXXU1BPLB
CP: G930FXXU1BPJJ
CSC: G930FUUB1BPL4
Any help of this is much appreciated.
you should install all of them, in the order it says,
brianj41 said:
you should install all of them, in the order it says,
Click to expand...
Click to collapse
OK. But do you have the link to the firmware that I can use? I am not sure from the above information which firmware would be suited for my version of Galaxy S7. Looking for the downloadable firmware.
gopikn123 said:
OK. But do you have the link to the firmware that I can use? I am not sure from the above information which firmware would be suited for my version of Galaxy S7. Looking for the downloadable firmware.
Click to expand...
Click to collapse
Hi mate
You had a Marsmellow firmware you can basically flash any official firmware you want , as long as it belongs to a G930F , pick a country similar or same to where you live
Check here
Get a Nougat firmware they are working fine, follow the intruction in how to flash , pick CSC or home_csc , CSC will factory rest your phone will it leave it like new , if you use home_csc has to be same as the one you have your phone then you will not lose any data
SM - G930F
Thank you!!
I got the file downloaded now. Do I need to select all the AP, BL, CP and CSC on the ODIN software to reset it?
gopikn123 said:
Thank you!!
I got the file downloaded now. Do I need to select all the AP, BL, CP and CSC on the ODIN software to reset it?
Click to expand...
Click to collapse
hi
Yes with those 4 files the phone will be clean as new
MAX 404 said:
hi
Yes with those 4 files the phone will be clean as new
Click to expand...
Click to collapse
Today morning again the phone got hanged in the bootscreen. So, I decided to run the ODIN3 with all the 4 files selected. I installed the Samsung drviers and followed all the instruction and run the application with all the 4 files selected. The process showed success in the ODIN3 application. But even after that, the phone is stuck on the bootloader Samsung with Galaxy S7 logo.
Any idea what to do next or how to resolve this issue?
gopikn123 said:
Today morning again the phone got hanged in the bootscreen. So, I decided to run the ODIN3 with all the 4 files selected. I installed the Samsung drviers and followed all the instruction and run the application with all the 4 files selected. The process showed success in the ODIN3 application. But even after that, the phone is stuck on the bootloader Samsung with Galaxy S7 logo.
Any idea what to do next or how to resolve this issue?
Click to expand...
Click to collapse
Hi
Did you use CSC? do a factory reset and flash again
MAX 404 said:
Hi
Did you use CSC? do a factory reset and flash again
Click to expand...
Click to collapse
Yes, I did that.
gopikn123 said:
Yes, I did that.
Click to expand...
Click to collapse
Did you factory reset from recovery and flashed firmware again?
Perhaps someone can answer a similar question for me? I have the XEU nougat beta firmware, can I flash the BTU final nougat without needing to factory reset?
MAX 404 said:
Did you factory reset from recovery and flashed firmware again?
Click to expand...
Click to collapse
Yes, I tried it again. But didn't work. Now it shows a black screen with the blue light always on.
gopikn123 said:
Yes, I tried it again. But didn't work. Now it shows a black screen with the blue light always on.
Click to expand...
Click to collapse
OK.... here is the SAD news.. I gave the phone for repair on a local cellphone shop. They did some testing on it and said its related to software. After trying to fix it with installing software and other fix they called me a while back and said `THERE IS NO FIX FOR IT`.
Not sure what to do with it. Bought this unlocked only 6 months back and its already dead....
Never going for another Galaxy for sure.
senote said:
Perhaps someone can answer a similar question for me? I have the XEU nougat beta firmware, can I flash the BTU final nougat without needing to factory reset?
Click to expand...
Click to collapse
Yeah, you can do that, but is preferable to do the flash then a factory reset...
Hi Guys,
I have a British Galaxy S7 (SM-G930F). I flashed (using the latest ODIN) a Dutch firmware on it that I downloaded from sammobile, but during the proces it was stuck on system.img. The phone doesn't start anymore. I triend to flash back the original firmware but it also was stuck on system.img. I also tried other firmwares, but no luck. The only thing I can do with the phone is getting to the Download mode.
I have done a lot of research online to get it working but no chance. The phone had FRP LOCK before I flashed it. Does that cause the problem?
Could you please advise me at this matter? It is really frustrating.
Hello,
Use Smart switch for restore, there're many tuto on Youtube
Smart Switch is app by samsung, it's available on their website.
zamalia59 said:
Hello,
Use Smart switch for restore, there're many tuto on Youtube
Smart Switch is app by samsung, it's available on their website.
Click to expand...
Click to collapse
I have tried that but smartswitch does not recognize the phone at all :$
What version of ODIN are you using?
Sent from my SM-G930F using Tapatalk
I have noticed you are using DRA9 firmware. You need to use software that also has bootloader in same version. Any other will not work.
Cholek3 said:
I have noticed you are using DRA9 firmware. You need to use software that also has bootloader in same version. Any other will not work.
Click to expand...
Click to collapse
Is that new since DRA9?
First I've heard for the unlocked G930F, always been able to flash any firmware to it regardless
coto39 said:
What version of ODIN are you using?
Sent from my SM-G930F using Tapatalk
Click to expand...
Click to collapse
I used ODIN 3.12.3 and 3.12.7 and I got the same result with both.
Cholek3 said:
I have noticed you are using DRA9 firmware. You need to use software that also has bootloader in same version. Any other will not work.
Click to expand...
Click to collapse
I tried to flash the original firmware back but no luck.
United Kingdom (H3G) - G930FXXS2DRA9 (7.0)
I assume that this one has the same bootloader version.
*Detection* said:
Is that new since DRA9?
First I've heard for the unlocked G930F, always been able to flash any firmware to it regardless
Click to expand...
Click to collapse
How do you flash firmware then if you just have access to the Download mode on a phone and FRP LOCK is ON?
From what I've read FRP only affects the system and your ability to use android and access the partition data after performing a Factory Reset from outside the system (using for example a custom recovery). It should not stop you from flashing a rom in Download mode. I remember myself being in the same trouble as you are, with system getting stuck while flashing. I can't remember how I solved it. I'll search my chrome bookmarks and report back.
Have you tried changing the usb port (the one your are connecting the phone to) and/or the usb cable?
Sent from my SM-G930F using Tapatalk
riffina said:
How do you flash firmware then if you just have access to the Download mode on a phone and FRP LOCK is ON?
Click to expand...
Click to collapse
Same way you would if FRP lock was off, as that is the way to fix FRP lock
ODIN 3.12.3 or newer
Put phone in download mode
Connect to PC USB
Check Re-partition in ODIN options if changing CSC (Might be an idea anyway)
Flash AP, CP, BL and CSC together
Allow phone to reboot
*Detection* said:
Is that new since DRA9?
First I've heard for the unlocked G930F, always been able to flash any firmware to it regardless
Click to expand...
Click to collapse
Newest bootloader (DRA#) locks phone for changing csc and downgrade, but that mainly fails at loading "param.bin" in odin. There is still a possibility to change CSC or downgrade, but you have to mix and match two different firmwares.
riffina said:
I tried to flash the original firmware back but no luck.
United Kingdom (H3G) - G930FXXS2DRA9 (7.0)
I assume that this one has the same bootloader version.
Click to expand...
Click to collapse
Try flashing BTU then.
coto39 said:
From what I've read FRP only affects the system and your ability to use android and access the partition data after performing a Factory Reset from outside the system (using for example a custom recovery). It should not stop you from flashing a rom in Download mode.
Click to expand...
Click to collapse
That is totally correct.
Cholek3 said:
Newest bootloader (DRA#) locks phone for changing csc and downgrade, but that mainly fails at loading "param.bin" in odin. There is still a possibility to change CSC or downgrade, but you have to mix and match two different firmwares.
Try flashing BTU then.
That is totally correct.
Click to expand...
Click to collapse
I have just tried to flash BTU (G930FXXS2DRAA)... I got the same result as by the original firmware. See attachement
Next step... Another computer.
*Detection* said:
Same way you would if FRP lock was off, as that is the way to fix FRP lock
ODIN 3.12.3 or newer
Put phone in download mode
Connect to PC USB
Check Re-partition in ODIN options if changing CSC (Might be an idea anyway)
Flash AP, CP, BL and CSC together
Allow phone to reboot
Click to expand...
Click to collapse
Do you mean that I have to Check re-partition? I thought that I'm not supposed to do that!
I tried to flash just the AP, but still the same problem. see attachment.
In case it helps somebody to see the problem, I took a picture of the info I see on the Download mode. See attachment.
That System Status: custom makes me wonder if this could be the issue? That should not really have anything to do with it, but did you try doing "Wipe Cache Partition" and "Wipe Data/Factory reset" in recovery?
Cholek3 said:
That System Status: custom makes me wonder if this could be the issue? That should not really have anything to do with it, but did you try doing "Wipe Cache Partition" and "Wipe Data/Factory reset" in recovery?
Click to expand...
Click to collapse
Tried it. No luck!
Hi Guys,
I have tried other USB-cables... I have tried 4 of them and one them solved the issue.
I can now conclude that the USB-cables I was using were not good.
Thanks for the answers guys.
Well. nice that you found the culprit. Try to buy an official USB cable from one of the Samsung Service Centers near you. The offcial cable is cheap.. like 5-6 USD the 1m long and 8USD the 1.5m long ones
Sent from my SM-G930F using Tapatalk
I bought the S22 ultra Korean version with KT branding. I really don't like their bloatware.
I downloaded the non-branded Korean firmware (KOO) and also the non-branded US firmware (XAA).
I tried to flash both using Odin but no luck. It continuously shows the "Secure check failed: PIT" error.
What am I missing?
My first priority is to flash the US non-branded firmware. Both of the models are Snapdragon. So, is it possible to do so?(2nd question)
Original Baseband: S908NKSU1AVCH
Downloaded Korean Baseband: S908NKSU1AVCK_S908NOKR1AVCK_KOO
Downloaded USA Baseband: S908U1UEU1AVC8_S908U1OYM1AVC8_XAA
Odin: 3.14.1
update: Finally successfully flashed Korean non-branded firmware. But CSC didn't change. It is still KT branded one. What did I miss?
You have to look for chimeratool or Samkey to change csc.
did you flash the CSC file ? or just the AP
gav83collins said:
did you flash the CSC file ? or just the AP
Click to expand...
Click to collapse
I used all the four files (BL, AP, CP, and CSC). I didn't use HOME_CSC, used CSC instead.
yeah i was just checking, i dont know then did you try chimeratool or Samkey
gav83collins said:
yeah i was just checking, i dont know then did you try chimeratool or Samkey
Click to expand...
Click to collapse
Sorry, I didn't try Samkey or chimeratool. Is it possible to change CSC by flashing the ROM via odin?
well usually, you can choose to just flash the csc on its own, i dont know why its not working without insulting you with questions like "is usb debugging" enabled lol
gav83collins said:
well usually, you can choose to just flash the csc on its own, i dont know why its not working without insulting you with questions like "is usb debugging" enabled lol
Click to expand...
Click to collapse
Haha, there is nothing to get insulted about. We, humans, are prone to make silly mistakes. I didn't make this mistake this time maybe.
Checklist:
1. USB debugging enabled
2. Samsung driver reinstalled
3. Downloaded Odin's latest version
4. OEM lock disabled
5. Bootloader lock enabled/disabled (tried both).
I was able to flash the firmware once but didn't change CSC. But don't know why.
Then I tried to flash the firmware again but didn't work. It fails to write. Tried more than 20 times with different configurations but no luck.
have you tried the patched versions of odin ? check my thread "here" for links
Thank you for the patched app. If I used patched Odin, will it trigger Knox?
And can I flash US non-branded firmware to Korean branded phones?
Both are single sim snapdragon phones.
i would assume so, but you know what presumption did......... if its a stock rom i dont think it will trigger knox, aslong as its an unmodified official release firmware you should be ok
ive been out of the game for a while due to the pleasure of her majesty, so wait to see what other people say that have been more current than me
I have tried using patched Odin. But it's stuck at Setup Connection.
the only other thing im thinking is maybe there is an error in the download, back in the day they used to come with md5 checksums, they dont seem to now, how confident are you the download isnt corrupted ? have you tried to extract it to see that it unpacks properly
gav83collins said:
the only other thing im thinking is maybe there is an error in the download, back in the day they used to come with md5 checksums, they dont seem to now, how confident are you the download isnt corrupted ? have you tried to extract it to see that it unpacks properly
Click to expand...
Click to collapse
Finally, I was able to flash using Odin. The problem was I tried to flash the US version first which returns with PIT error. But then I tried to flash Korean ROM without restarting the phone. Which caused the problem. But if I flash with a fresh start inside download mode, it works fine.
But the pit error problems are still there for the US ROM. Is there any way to flash US ROM on Korean model?
Thanks a lot for all the replies.
nazmulnsu said:
Finally, I was able to flash using Odin. The problem was I tried to flash the US version first which returns with PIT error. But then I tried to flash Korean ROM without restarting the phone. Which caused the problem. But if I flash with a fresh start inside download mode, it works fine.
But the pit error problems are still there for the US ROM. Is there any way to flash US ROM on Korean model?
Thanks a lot for all the replies.
Click to expand...
Click to collapse
ive only ever owned australian and uk devices, so i couldnt tell you with any certainty, but one would assume if its the same chipset / processor the region of the rom shouldnt make any difference
Yes, I assumed that too. But seems like Samsung added some extra layer of security for different pit files. I tried many ways to flash US firmware. But, it always says "Secure check fail: pit".
Hope someone can crack that. Thanks a lot for your kind replies.
However, I was able to flash KOO ROM a few times but it didn't change the CSC. My phone still remained KT branded.
I tried to cleared cache and did factory reset before booting and after flashing, but no luck.