[Samsung Galaxy S7 Questions and Answers] akpa:
Hi guys, I flash BTU Rom to change my CSC to receive orio faster. after 1 month Samsung rollout orio for my country (Iran) so I have decided flash again my phone because THR rom has Persian calendar, but after flashing my phone I see my phone CSC set on LYS , after search on internet I found out Samsung multi CSC Roms have default CSC , and you can not change it easily.

so I search forums and can't find anything useful until seeing a way in Persian site and it Assured me it is possible. ok talking enough go to work:)

combination file works. It's a unique file and not available easily, so every website is taking advantage of it by making it paid, some sites charging per file!

I provide combination file for s7 orio file in my host but it is available just for 13 days from today if someone can upload it to Mediafire or something else it is wonderful.

Prerequisite:

*Official ROM from Sammobile that contains the CSC you want

*Combination file for your phone

*Original/Genuine USB Cable, don't use 3rd party cable or you will have a nice expensive brick if a connection is lost.

*Charge your phone/laptop. 50% is fine.

*Remove SIM & SD Card.

*Patience.

*Important- BACKUP. Use Smartswitch (Faster) OR Samsung Cloud Backup. Remember, you won't be able to restore everything (Apps) if you backup from Nougat & then restore it on 6.0.1, so backup with all the options available.

*Balls of Steel--Kidding

1- Download the latest Combination file '500MB' at the bottom from https://firmware.gem-flash.com/ it for s7 G930D/FD http://fs2.filegir.com/akpa/COMBINA...1296_REV00_user_mid_noship.tar.md5-id88783.7z

2- Flash the official ROM from Sammobile that contains the CSC you want. so I used the latest THR firmware available from Sammobile.

3- After flashing the official ROM, Do a Factory Wipe.

2. Fire up Odin, I used Odin 3.13.1. Extract and select Combination file you downloaded in AP AND your country CSC file from official ROM. Two files only.

4. After successful flashing is done, wait for the phone to boot up, it will go into diagnostic/Factory mode, don't panic.

5- Tap Factory IMEI and enter the code *#243203855# ,it will show you a list of available CSCs, choose the one you need and tap install, the phone will reset/restart.

6- Just in case, do one more Factory/Cache Wipe.

7- Power off the phone & enter download mode and Flash it with your country's official ROM. Four files (BL+AP+CP+CSC) Use CSC, don't use Home_CSC.

8- Knox Zero. System Status: Official

9- You can check your active CSC in recovery mode or use Phone info app.

sorry for my bad English.

*be careful the combination build number like G930FXXU2ARA2 and freamware build number like G930FXXU2EREM . the red number must be equal.

**if you have a problem in step 3 you can flash the ap and CSC separately after flash two file, go to recovery with power + home + volume+ after finish the erasing operation select reboot to system.

*** if in step 5 your list is empty, go to downloading mode flash CSC File from your ROM(not home_CSC) and go to recovery with power + home + volume+ after finish the erasing operation select reboot to system.

****if you break your phone don't afraid just go to downloading mode and flash official rom.

Let me know if you face any issues or were successful. It will help others.