There are two different methods to change the CSC Code in Samsung devices. The first method is pretty simple and you only need to type in a single code on the dial-pad. However, users have reported that after the Android 11 update, this method isn’t working for some of them. If that is the case, with you as well, then you should try out the second method.
This method is surely known to work out, but the process requires an unlocked bootloader as well as an unlocked carrier network. So it is recommended that you go for the first method and if it doesn’t work out, then only chose the second method. With that said, I would highly recommend you to take a backup of all the data on your device, irrespective of the method you are going to try out.
Method 1: Change Samsung CSC Code using Dialer

Bring up the dial-pad on your device.
Type in *#06*. This should bring up the IMEI number. Copy it.
Now type in *#272*IMEI# and replace IMEI accordingly.
It should bring up the Preconfig page where you would find the list of all the available CSC codes.
If you’re running an OXM Multi-CSC Firmware, then there could be 70+ CSC options to choose from.
With that said select the desired one from the list and tap Install.
Once installed, your device will reboot with the newly installed CSC as the active one.
However, if you aren’t able to change the CSC code on your Samsung device running Android 11, then please refer to the next method given below.
Method 2: Change Samsung CSC Code via Odin Tool
As mentioned before, this process requires an unlocked bootloader, which will wipe off all the data from your device, make its warranty null and void, and trip the Knox Counter. If that’s well and good, then refer to our guide to How to Unlock Bootloader on any Samsung Device [New VaultKeeper Method]. Once done, proceed with the below steps.
First off, download the Multi-CSC (OXM) firmware for your Samsung device via Frija.
Then extract its content to any convenient location on your PC. 
Download and install Odin onto your PC.
Now boot your device to Download Mode and then connect it to PC via USB cable. 
Open Odin and load the BL, AP, CP, and CSC (the normal one, not the Home CSC) files to the Tool via its appropriate sections. 
Then go to the Options section of Odin and make sure to enable Auto-Reboot and F. Reset Time (if they aren’t done so automatically).
Finally, hit the Start button and wait for the process to finish. Once done, you will get the Pass message. 
That’s it. You may now disconnect your device from the PC and close the tool as well. If u find this helpful kindly click on the three dots and click accept as solution
