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[Guide] How to change CSC on A51

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mzayd786

Member
Mar 10, 2018
16
1
Warning: Do this at your own risk, I am not responsible for any damage that is caused to your device. This method worked for me and should work for everyone.

Credit to yakapa40 on XDA for the apk. This would be impossible without him!

You must make sure the model numbers are the same for the country you want to change to. To check that go to

https://www.sammobile.com/firmwares/recent/

and type in your device model number. leave country code blank. The countries that are listed are those that will work on your specific device. DO NOT TRY TO CHANGE TO A DIFFERENT MODEL NUMBER COUNTRY!

MAKE sure device has above 70% battery just to be safe

OK lets start!

Backup all your data on samsung cloud and google

This will **erase** all your data

Download samsung drivers

https://www.hardreset.info/download/samsung-drivers/

Check the CSC code you want from
https://forum.xda-developers.com/showthread.php?t=2546689 credit to Jasi2169
Important later

download the firmware you want from sammobile (slow download speed) or

https://samfw.com/ for faster download speeds.

It will be a zip file so use winrar to extract and you should get 5 files that start with

AP (System &Recovery)

BL (Bootloader)

CP (Modem / Radio)

CSC\_ (Country / Region / Operator)

HOME\_CSC (Country / Region / Operator)

DELETE the home file

Next download Odin

https://dl2018.sammobile.com/Odin3-v3.14.4.zip

Extract the Odin file and run as administrator

Add each file to its respective field in Odin

Now we need to put the phone in download mode to do that go to:

https://www.hardreset.info/devices/samsung/samsung-galaxy-a51/download-mode/

keep trying until it works.

Next plug the device in and press start. It should take about 3-4 mins for odin to say PASS

DO NOT UNPLUG THE PHONE AT ANY POINT EVEN AFTER ODIN SAYS PASS

Let the phone do its thing and dont worry if it takes too long on the Samsung screen.

You should then be greeted with the welcome screen BUT it may not be the correct language so set it to English (I flashed UK firmware and it came in Russian)

Set the phone up but dont worry about apps we are going to reset the phone again

Head over to (APK provided by yakapa40)

https://drive.google.com/file/d/1hU3vl_V7NsRgI_RsQywytORoB8isJ1ni/view?usp=sharing

on your device or PC and download it. Extract and it should be a apk file. Download it with your device.

Allow unknown sources and it should says done and not open (that is normal)

put you device in flight mode/airplane mode

hold down the home screen and go to themes

Galaxy themes

My stuff

Select mysterious theme(make sure not to click update)

Select try it out

Go to Settings

About phone

Legal information

Change Carrier or whatever third option is (the one that says android 10)

Choose and install the CSC you want (that 3 letter code) remove sim and it will restart phone

again, dont worry if its on the Samsung screen for too long.

You should be back on the welcome screen and you are done!!!

Set up the phone and enjoy!!!


Credit to yakapa40 again on XDA for the apk. This would be impossible without him!
 
Last edited:

armanate

New member
Sep 16, 2020
2
0
hey, my galaxy theme has not try out option in airplane mode ,, it says check network connection (it has only two button check connection and try again , no try out)... what should I do?
 

danao78

New member
Dec 23, 2020
1
1
I already installed the mysterious theme and select "try it out", I went to "settings", About phone and in "Legal Information", the option "Change Carrier" does not appear, what could be the problem?
The software version says it is October 1, 2020. Thanks!
 
Last edited:
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oldnoob

Senior Member
Jul 21, 2010
104
13
Miami
I already installed the mysterious theme and select "try it out", I went to "settings", About phone and in "Legal Information", the option "Change Carrier" does not appear, what could be the problem?
The software version says it is October 1, 2020. Thanks!

Just got a new phone with the same software version and the same problem. Did you ever come up with a solution?

Thanks.

Edit: actually this is closer to my problem.
hey, my galaxy theme has not try out option in airplane mode ,, it says check network connection (it has only two button check connection and try again , no try out)... what should I do?
 
Last edited:

andr123a

Senior Member
Feb 2, 2013
73
4
Hi, I changed csc on my A51 in order to enable native call recording feature ( Italian stock firmware and Vietnam XXV CSC ) but after last OTA update ( build a515fxxu5eug5 ) google pay stopped working due to "unsafe firmware", as it was rooted.
Which is your advice ?
 

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    I already installed the mysterious theme and select "try it out", I went to "settings", About phone and in "Legal Information", the option "Change Carrier" does not appear, what could be the problem?
    The software version says it is October 1, 2020. Thanks!