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[TUTORIAL] How to change sales code and CSC without root or tripping KNOX

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By Madness., Senior Member on 9th May 2018, 01:24 AM
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This method is useful if you're unable to change your CSC in multi-csc roms. Or if you don't have the desired CSC for Note FE, this tutorial will assist you to change with the best way.

1) Get the sec_csc.zip from other device that have your CSC as DEFAULT csc

Download other device's firmware here, note that newer devices like Note 8 doesn't have CSC system. Best way is to use S7 Edge files. Android version doesn't matter.

After downloading, extract the zip file. You should have 4-5 files inside folder. Pick one that starting with HOME_CSC or CSC. It doesn't matter. If you have 1 file rom, pick that file. Change file extension from tar.md5 to tar. Open the file with your desired archive manager application. Copy "cache.img" or "cache.img.lz4" out of the archive depending on what you have. You now need to decompress lz4 file if you have lz4 file. Use this link if you have Windows. For other OS'es do your own research.

Now you got the cache.img. Extract the files inside it. These links might help to extract cache.img, if you have another OS, use tool named "simg2img" and a tool to mount or extract img file as ext4. I'm leaving these kitchen links to extract cache.img.

https://forum.xda-developers.com/app...0-0-0-t3601702
https://forum.xda-developers.com/che...tchen-t3410545

Get "sec_csc.zip" in the "recovery" folder, if you don't have this file, try extracting this from another ROM. Open the zip file, and take a look inside it. In the "system/csc" folder there's a file named "sales_code.dat". Open this file with text viewer, and check if this sales code matches with your desired one. If it doesn't match, try extracting sec_csc.zip with desired sales code from another ROM. Don't try to edit this file, if you don't have a custom recovery or if you don't want to experiment it as I didn't try it.

2) Get platform-tools (SKIP THIS if you will use SD-Card for installation. USE Only if you don't have SD-Card or don't want to install with SD-Card)

Download platform-tools from Google. You will use adb sideload to install the zip. Check 3rd step for further information.

3) Installation (READ THIS even if you know about flashing ZIPs or you will probably fail, this part is the most important part of this tutorial)

Reboot into recovery

Wipe data

Install zip (sec_csc.zip) using SD-Card or ADB-Sideload

Your device will reboot and change the sales code to default one in the sec_csc.zip that you flashed.

4) Reflash official ROM (ONLY IF your CSC is in one of the official ROMS for your device with your desired Android version) using ODIN.

I won't be explaining this in detail. If you don't know do your research. Just take 4-5 files rom and select AP BL CP CSC (i'd prefer to not select HOME_CSC) in the appropriate places. If you aren't expert make sure that you don't tick the Re-Partition, nand erase etc. and don't select PIT file while flashing.
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10th May 2018, 06:43 AM |#2  
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Hi, thanks for your guide

I just wannt confirm the SS Pay will work with that replacing CSC?
12th May 2018, 02:37 PM |#3  
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Quote:
Originally Posted by Google+

Hi, thanks for your guide

I just wannt confirm the SS Pay will work with that replacing CSC?

If your region supports, it probably will.
12th May 2018, 08:51 PM |#4  
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No need to wipe data. However, if you have a Multi-CSC, it won't work that easy from firmware ARA1 and on, due to new security measures. You will then need either root or the combination firmware.
13th May 2018, 08:14 PM |#5  
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Hello. Thanks to add the credits. The first one who made this trick is me

Envoyé de mon SM-N935F en utilisant Tapatalk
15th May 2018, 12:19 AM |#6  
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Quote:
Originally Posted by treysis

No need to wipe data. However, if you have a Multi-CSC, it won't work that easy from firmware ARA1 and on, due to new security measures. You will then need either root or the combination firmware.

If you don't wipe data, sales code won't change, and this is the suggested method provided by Samsung. Without wipe, changes weren't persistent for me, they disappeared after wiping cache.
15th May 2018, 12:26 AM |#7  
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Quote:
Originally Posted by benyou54

Hello. Thanks to add the credits. The first one who made this trick is me

Envoyé de mon SM-N935F en utilisant Tapatalk

All credits to Samsung, that's how CSC installation works. And I didn't see any tutorial for changing "sales" code, found it by trying. All I wanted was to switch to TUR csc on KSA rom, it has OJV csc which contains TUR. Got it after changing my sales code and reflashing the original rom. Everywhere suggests insert sim and wipe data, or some *#code etc which doesn't work anymore. And it's stupid idea to downgrade for that csc change code even if possible.
15th May 2018, 06:17 AM |#8  
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Quote:
Originally Posted by Madness.

All credits to Samsung, that's how CSC installation works. And I didn't see any tutorial for changing "sales" code, found it by trying. All I wanted was to switch to TUR csc on KSA rom, it has OJV csc which contains TUR. Got it after changing my sales code and reflashing the original rom. Everywhere suggests insert sim and wipe data, or some *#code etc which doesn't work anymore. And it's stupid idea to downgrade for that csc change code even if possible.

This process is not from Samsung. Samsung does not allow that kind of csc change. Now after the january security update, the only way to change the csc code for the multi CSC, it's to use the combination firmware used in the factory process to test.
If you used a single carrier csc, you don't need to factory reset your FE to change the sale code. Click image for larger version

Name:	Screenshot_20180506-165706.jpeg
Views:	1010
Size:	40.2 KB
ID:	4501524

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15th May 2018, 08:31 AM |#9  
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can i change korean CSC from N935k to another country CSC?
15th May 2018, 03:52 PM |#10  
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Quote:
Originally Posted by energizer

can i change korean CSC from N935k to another country CSC?

It should work for any Samsung phone with CSC system.
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15th May 2018, 03:56 PM |#11  
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Quote:
Originally Posted by benyou54

This process is not from Samsung. Samsung does not allow that kind of csc change. Now after the january security update, the only way to change the csc code for the multi CSC, it's to use the combination firmware used in the factory process to test.
If you used a single carrier csc, you don't need to factory reset your FE to change the sale code. Attachment 4501524

Envoyé de mon SM-N935F en utilisant Tapatalk

Well, that's how CSC gets loaded into system. It's in cache image, it gets flashed after firmware update. Wiping data yields more reliable results, but I wouldn't mind it if I had lots of data on my phone. Looks like you still didn't get the point though, this tutorial is for changing "sales code", not only "csc"
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