I am a technical guy, but this is my first time hacking into my cell phone firmware, so please be patient with me. I tried to search this forum for the applicable case, but the amount of information is overwhelming. So I am hoping that somebody with the relevant experience could advise me which path to take and could guide me through the process.
Problem description:
Samsung Galaxy S7
SM-G930F (international model), unlocked
CSC: G930FUUB8ETCD (TPA, Panama, don’t ask me why)
My Canadian operator (Videotron) is shutting down their 3G network. I need to enable VoLTE in my phone in order to be able to make voice calls and send SMSes. I have already received a VoLTE-capable SIM and I tested it in a different device. I checked hidden menus in my phone, “VoLTE Provisioned” flag is OFF and greyed out (I am not able to flip it).
This phone model seems to be capable of VoLTE. I found some screenshots of this model in UK (Vodafone) with VoLTE menu present in the regular phone settings (Connections-> Mobile Networks).
I think my best shot to enable VoLTE in my phone is to replace the phone’s firmware to CSC BTU. This firmware is for the same model – SM-G930F, so I expect it to work on my device and hopefully give me the VoLTE option.
Questions:
1. Did anybody have a similar issue with their Galaxy S7 and how did you fix it?
2. I found a number of articles and videos about using Odin to update a Samsung phone to the latest firmware within the same CSC, but I haven’t seen a step-by-step guide about flashing a completely different firmware with a CSC change. Can anybody help me to understand the specifics of that process (which problems to expect, any particular steps to take)?
3. Is there a better CSC option than BTU in my case?
4. A more specific question about Odin. There is an option “Re-Partition”. Some articles recommend this option, some don’t. Does anybody know exactly what this option is used for? Do I need to select it when I am replacing CSC firmware on my device?
5. There seem to be two CSC files in a firmware package – CSC_xxx and HOME_CSC_xxx. Some guides suggest to use HOME_CSC, but the most common recommendation is to use the CSC one. What is the difference between these two files and which one shall I use in my case?
6. I do have a Google account in my phone and I do remember the password for it. Does it mean I do not have to worry about FRP lock? It is my understanding that I will simply enter the password when I am prompted for it after the upgrade and that will be enough to proceed. Or shall I still remove the account before flashing the firmware?
7. Is my understanding correct that by changing CSC firmware I will reset my device and will lose all apps and settings? How much of that will I be able to restore from a backup using SmartSwitch?
8. Do I need to remove the SIM when flashing the firmware? When do I insert the sim back? Will it be an issue if the SIM is from a different country than the CSC? I haven't seen any instructions for that matter.
Thank you in advance for your help. It will be much appreciated.
Felix.
Try the SamFw Tool to change the CSC.
If successful, you can make a donation to developer @Tungtata - author of SamFw Tool.
SamFw Tool 4.7.1 - Remove Samsung FRP one click
Hi Today, we introducing SamFw FRP Tool version 4.7.1 Main function: Remove FRP with one click Change CSC with one click Remove FRP for new se...
samfw.com
ze7zez said:
Try the SamFw Tool to change the CSC.
If successful, you can make a donation to developer @Tungtata - author of SamFw Tool.
SamFw Tool 4.7.1 - Remove Samsung FRP one click
Hi Today, we introducing SamFw FRP Tool version 4.7.1 Main function: Remove FRP with one click Change CSC with one click Remove FRP for new se...
samfw.com
Click to expand...
Click to collapse
Thank you, but before I attempt anything I would like to understand what I need to do in order to change CSC on my device and if that tool does what I need. It is my understanding that there are different ways to change CSC. Some firmwares support multiple CSCs and that seems to be the case with my current firmware. Unfortunately my current firmware does not have any UK CSCs. Those that are supported most probably do not support VoLTE. So the question remains if the tool that you advertise will do what I need.
@Tungtata , do you care to comment on this thread, please? Does your tool replace the firmware or does it switch the same firmware to a different CSC (if multiple CSC exist)?
Related
I've looked everywhere and can't find a proper walkthrough/tutorial for my questions
I have a g930w8 S7 canada which is a multi csc phone, i want to change the csc to another carrier that i'm now subscribed to and further they have newer update then old carrier.
So i'm wondering what my best choice is
1. change csc with *#272*IMEI# code, without sim in, let it reset, power off and then clear cache through recovery menu, then put sim in and it's essentially that new carriers phone? And latest firmware/ later otas would be to said new carrier?
2. flash latest new carrier firmware through odin and voila new carrier phone?
Which option is better? 1 is easier but does it change active csc and then when new update downloads does it change firmware csc?
Thanks for your help
Kevotwo said:
I've looked everywhere and can't find a proper walkthrough/tutorial for my questions
I have a g930w8 S7 canada which is a multi csc phone, i want to change the csc to another carrier that i'm now subscribed to and further they have newer update then old carrier.
So i'm wondering what my best choice is
1. change csc with *#272*IMEI# code, without sim in, let it reset, power off and then clear cache through recovery menu, then put sim in and it's essentially that new carriers phone? And latest firmware/ later otas would be to said new carrier?
2. flash latest new carrier firmware through odin and voila new carrier phone?
Which option is better? 1 is easier but does it change active csc and then when new update downloads does it change firmware csc?
Thanks for your help
Click to expand...
Click to collapse
Hi mate
assuming you are not root
option 1 is good but is not working anymore in most phones , once you change your CSC it stay active until you flash a different firmware with different CSC
option 2 maybe your only option , all canadian firmwares i see they seem to be single CSC , which one are you looking for? if so just flash it ( use CSC file , not home_csc) and you are done......backup csc change will factory reset your phone
Hello,
I have been trying to find an answer to my question or a solution but all the results I found on XDA are Snapdragon model oriented.
My question is about changing the CSC just to be able to receive OTA updates faster ( I don't want Samsung Pay ..) . I aleady know that the product code is hardcoded into the phone I just need to change last three letters of the CSC.
My rom is part of the OXM multi-CSC rom, I flashed it and tried the famous code to change the CSC region but no results so far. I also do not have any other sim card to trick the phone after factory reset.
Could anyone please help ? has anyone been able to change CSC via odin ?
Regards.
Can anyone help please ? is my question a little bit confusing ?
AyoubK said:
Hello,
I have been trying to find an answer to my question or a solution but all the results I found on XDA are Snapdragon model oriented.
My question is about changing the CSC just to be able to receive OTA updates faster ( I don't want Samsung Pay ..) . I aleady know that the product code is hardcoded into the phone I just need to change last three letters of the CSC.
My rom is part of the OXM multi-CSC rom, I flashed it and tried the famous code to change the CSC region but no results so far. I also do not have any other sim card to trick the phone after factory reset.
Could anyone please help ? has anyone been able to change CSC via odin ?
Regards.
Click to expand...
Click to collapse
Changing CSCs isn't possible without root or without a local SIM card from the country whose CSC you want to use.
If you're so eager to get faster updates, just flash them with HOME_CSC_OXM as they are released, you won't lose your data and you'll be on the latest OXM builds as well.
murtaza02 said:
Changing CSCs isn't possible without root or without a local SIM card from the country whose CSC you want to use.
If you're so eager to get faster updates, just flash them with HOME_CSC_OXM as they are released, you won't lose your data and you'll be on the latest OXM builds as well.
Click to expand...
Click to collapse
Thank you for the answer
Hello, i am using a samsung galaxy S22 ultra(SM-S908U)....
It is a usa unlocked piece currently using it in india and i am unable to recieve OTA updates since the day i bought it...the last security patch update it shows of is of May 1,2022....it shows it is running latest software version when tried to update the phone...
Service provider software version shows csc of the device as GCF,/GCF,GCF/XAA.
Full model number of the device is SM-S908UZKEVZW
Can anyone tell me how to get an ota update on this device and i also want to change its csc code to indian csc code so is it possible to do so without tripping the knox or bricking the phone....
pushkar0501 said:
Hello, i am using a samsung galaxy S22 ultra(SM-S908U)....
It is a usa unlocked piece currently using it in india and i am unable to recieve OTA updates since the day i bought it...the last security patch update it shows of is of May 1,2022....it shows it is running latest software version when tried to update the phone...
Service provider software version shows csc of the device as GCF,/GCF,GCF/XAA.
Full model number of the device is SM-S908UZKEVZW
Can anyone tell me how to get an ota update on this device and i also want to change its csc code to indian csc code so is it possible to do so without tripping the knox or bricking the phone....
Click to expand...
Click to collapse
It is not possible to change CSC without tripping Knox. You must unlock the bootloader to change the CSC.
V0latyle said:
It is not possible to change CSC without tripping Knox. You must unlock the bootloader to change the CSC.
Click to expand...
Click to collapse
I want to change my csc to indian csc (ins)....is it possible to change it from gcf and if yes how?
pushkar0501 said:
I want to change my csc to indian csc (ins)....is it possible to change it from gcf and if yes how?
Click to expand...
Click to collapse
Unlock the bootloader and use Odin to flash OXM firmware. OXM is multi-CSC, so you should be able to change region to India.
Don't forget you can use the Search function to look for solutions to questions that have been asked many, many times before.
V0latyle said:
Unlock the bootloader and use Odin to flash OXM firmware. OXM is multi-CSC, so you should be able to change region to India.
Don't forget you can use the Search function to look for solutions to questions that have been asked many, many times before.
Click to expand...
Click to collapse
My device has OYN multi-CSC and can't find anything about it on internet clearly which can solve my doubt...have shared Screen shots above
pushkar0501 said:
My device has OYN multi-CSC and can't find anything about it on internet clearly which can solve my doubt...have shared Screen shots above
Click to expand...
Click to collapse
Really?
I don't think you tried hard enough
First result
V0latyle said:
Really?
I don't think you tried hard enough
First
Click to expand...
Click to collapse
Have seen all those results already....my main concern is can i install INS csc on OYn multi-csc.....coz i didn't saw any particular search results for OYN multi-csc all were foe OXM only
pushkar0501 said:
Have seen all those results already....my main concern is can i install INS csc on OYn multi-csc.....coz i didn't saw any particular search results for OYN multi-csc all were foe OXM only
Click to expand...
Click to collapse
If you unlock your bootloader, you can install any CSC you want, so you'd just download INS firmware and flash it using Odin.
Or, you can flash the OXM firmware and simply change the region to India, as I stated in my first reply.
Ok i got that now second major issue is that i cannot unlock my bootloader as my developers option is not showing oem unlocking
no need to unlock your bootloader to change the CSC, just use this application to do so
SamFw Tool 4.7.1 - Remove Samsung FRP one click
Hi Today, we introducing SamFw FRP Tool version 4.7.1 Main function: Remove FRP with one click Change CSC with one click Remove FRP for new se...
samfw.com
and you can check the part on this post on how to change the csc
Enable & Select Bands thru Dialer (S22 Fam) /CSC CHANGE (S22 & MORE)
***Tested on S908U & S908U1*** But not limited, to those specific models. S22 Family should also be compatible as well...as the NEW FOLD 4. Thanks @Abaddon BAND SELECTION: To ENABLE all bands, please do the following: (See pictures attached...
forum.xda-developers.com
Please note you can't change it to Indian CSC, only US based CSC since your phone is from the US
Thankx
PapaDocta said:
no need to unlock your bootloader to change the CSC, just use this application to do so
SamFw Tool 4.7.1 - Remove Samsung FRP one click
Hi Today, we introducing SamFw FRP Tool version 4.7.1 Main function: Remove FRP with one click Change CSC with one click Remove FRP for new se...
samfw.com
and you can check the part on this post on how to change the csc
Enable & Select Bands thru Dialer (S22 Fam) /CSC CHANGE (S22 & MORE)
***Tested on S908U & S908U1*** But not limited, to those specific models. S22 Family should also be compatible as well...as the NEW FOLD 4. Thanks @Abaddon BAND SELECTION: To ENABLE all bands, please do the following: (See pictures attached...
forum.xda-developers.com
Please note you can't change it to Indian CSC, only US based CSC since your phone is from the US
Click to expand...
Click to collapse
Can you suggest best US based csc with regular ota updates as i am not getting ota update on gcf....stuck on may security patch update....
Can GCF based devices get ota updates i read it in someone's post that they can be only updated via odin or sideloading
GCF gives more LTE and 5G bands support so maybe that's why your phone has it set on that. You can change it to XAA as it's bloatware free and gets regular updates.
PapaDocta said:
GCF gives more LTE and 5G bands support so maybe that's why your phone has it set on that. You can change it to XAA as it's bloatware free and gets regular updates.
Click to expand...
Click to collapse
Wanted to ask it just out of curiosity....there is no way to change my csc from USA version to Indain version....by any means?
I don't think this is possible... and that's why Samsung has different variants for different countries ...
Okkk....
But by any chance u get to know that it can be changed to Indian csc please do let me know it will be very helpful
Thinking of flashing this firmware update via odin....device model number : SM-S908UZKEVZW
Region:VZW
OP, Are you sure it is an "unlocked" version? Based on he last three charactors of the model# you provided says it is a Verizon branded phone. Yes, technically it was unlocked after 60 days, but since you are not connected to Verizon's network, that may be the reason you are not getting OTA updates.
SM-S908UZKEVZW | Galaxy S22 Ultra 256GB (Verizon) Phantom Black | Samsung Business
Discover the Samsung Galaxy S22 Ultra 256GB (Verizon) in Phantom Black (SM-S908UZKEVZW), the phone that lets you work and collaborate on the go in ways you never thought possible.
www.samsung.com
As for unlocking the bootloader, none of the US variants' bootloaders are unlockable.
I changed my csc code from GCF to USC and now in sim card manager settings it is showing only sim1 option and esim no sim2 option is available
Hello people, I hope you're okay!
I bought an used S21+ but it was not clear that the model I would receive is Korean (G996N). While I don't have any issues, it also misses the eSIM option (and probably Samsung Pay is not going to work in Europe). The eSIM option would be really good to have (SPay I do not care a lot).
I've been searching for an answer in regards to change the region and the responses are mixed and I am out of Samsung phones and firmware loop for a few years. Some say I can just change the CSC region using SamFW and that's good to go. Some say it will not work because my KOO CSC does not allow this change. Also, OTA firmwares are lost until I switch the CSC back (but, from what I understood, if I also change the firmware it would receive OTA normally).
Question: is it possible, nowadays, to just change Firmware and CSC to another region? My phone has an Exynos processor so it would have to be a firmware from Europe or Latin America.
I also understood it will not brick nor trip knox efuse, right?
Thanks a lot!
@angourakis Ok let me give you a clear response about CSCs. ALL Samsung firmware will let you flash a new CSC (as long as you use Odin). This has worked for me every single time.
You need to update your Android to the latest 13 and download and extract this (remember to use “direct download”, this website is the only one with a good selection of firmware) and use Odin (get 3.14.1 non patched) to flash the HOMECSC file (in the CSC slot).
Hey @traman124 thanks for the response!
Why this firmware in specific? I am running a more recent firmware than the one you mentioned. Also, do I need to have the bootloader unlocked?
Thanks!
It doesn’t need to be that version @angourakis it can be any version… that one will work though And you can use Odin with a locked bootloader (with download mode).
@traman124 thanks again!
Unfortunately, I tripped knox while trying to install a CSC from G996B version (kept BL, AP and CP from G996N and only used CSC from B version).
Now I am trying to look for a trade in program to replace the phone.
Thanks anyway, I really appreciate your help!
@angourakis I’m sorry….. this has never happened to me while flashing CSCs but the few times I have I did it with the same variant phone/tablet…..
Hello,
I have an A536V (I bought it used and it's not paid off) and every time I try to flash a different firmware (XAA, TMO...) it just says secure check fail.
The phone should be unlocked because my T-Mobile SIM card works for a few seconds until the signal just goes away and doesn't come back. So my question is, what am I doing wrong? Why can't I flash any other software?
P.S. I used the SamFW tool to change my CSC to whatever was available (on VZW software the only ones available were FKR and GCF, neither of which bypassed whatever stops my SIM from working).
Please help! Thank you!
secure check fail means its either the wrong firmware or to low of a revision than whats on the device as in you cannot flash older firmware But that being said you are bassicly admitting you have a subsidized phone thats blacklisted due to non payment. So no other help will be given more than likely here
Look at this: https://www.androidauthority.com/how-to-unlock-a-verizon-phone-1131315/
"Once you hit that 60-day mark, Verizon will unlock the device automatically. However, you’ll have to pay it off in full if you want to take it to another carrier."
Move to Verizon. Easily solved here. (Well maybe. I don't know what Verizon thinks of that with buying a used phone not fully paid off.)
I have the same question, but I have a Verizon phone that is actually paid off
EDIT
I just wanted to change CSC to remove the ugly Verizon branding on boot
It stayed unlocked when I switched to GCF firmware (XAA was not available since this is technically a hardware revision from the usual A53 5G, this is the A53 5G UW - ultra wideband model)
Anyway I found out from someone else you can use SamFW to do this for free in the ADB tab
SamFw Tool 4.7.1 - Remove Samsung FRP one click
Hi Today, we introducing SamFw FRP Tool version 4.7.1 Main function: Remove FRP with one click Change CSC with one click Remove FRP for new se...
samfw.com