I have a SM-G985F/DS that was originally CSC as TPA. I got a 5g sim but it wasn't showing 5G ( i didn't know that the s20+ doesn't even support 5G). Anyways, i figured if i change it to Tmobile CSC that it will be work. TMB wasn't availiable on the CSC so i just picked TMS(slovakia tmobile). it worked but my connection is worse than before and i cant change it back. I used *#272*IEMI# to access the preconfig before but now it won't work (same day, same softwar, same everything). It keeps saying "connection issue or invalid MMI code". I also notice that as it runs the USSD code, the signal drops from 4G to H and then fails as soon as it changes to H. And it is consistent, meaning the USSD is causing that switch in networks or something. I have tried to reflash stock firmware from TPA, MAX, XID but the CSC from the firmware files are not changing the phone's CSC. The software build does reflect with ODIN being successfull and everything but the CSC just wont change. I also hoped that even if the CSC doesn't change with the flashes that the *#272* code works again; however, not the case, it still doesn't work.
I had read that android 10 allows for google phone to access the menu directly but i can't downgrade either. I keep getting bootloader check and kernel check errors on the phone side. I even tried to downgrade in the same order as upgrades. Even the latest previous build didnt work cuz it was binary 6 instead of 7.
Does anyone know how to fix this? Need help to either fix the CSC or how to downgrade to android 10 without issues(bootloader version and kernel version issues).
*samkey does not support my device.
PROBLEM SOLVED (SORT OF): I installed another multi CSC firmware that did not contain TMS and it was able to switch to the default on that firmware. When i switch back to OXM multiCSC firmware it defaulted to French CSC but *#272* code still did not work. But it worked on the other multi CSCfirmware. So looks like i won't be getting TPA back which was getting LTE+ receptions just fine. I switched over to OWA multicsc firmware which contained TCE CSC which is in mexico and uses the tmobile network for roaming. But it still does not use LTE but shows 4.5G which i assume is the same as either 4G+ or LTE. Either way, speed test shows ~40mbps down which is a hell of a lot better than ~5mbps on TMS.
i changed CSC on my G986B using samkey so they support s20 for sure.
Related
Issue: using 3 in the UK and they are running LTE Bands 3 and 20. I am looking at my wife's phone next to mine and she is camped on 3's Band 20. I am using an N900t and it won't allow me to enable those bands, even when forcing to either of them in the service mode. I'm running the OB6 firmware, CSC, and bootloader. The ROM is an Alliance TW 5.0 with TWRP as my recovery. I've also enabled CA as well as LTE Rev 10 to no avail.
I don't know much about how this OS works, but I am thinking that the baseband is reading the CSC and disabling the OCONUS LTE Bands, which is why they won't enable in the service mode. There is no other CSC for that firmware on sammobile, and I've read that flashing a mismatched CSC can cause incompatibility issues.
Thoughts?
The more I research, the more I'm confused. Can I use a CSC changer to change to the 3 UK region? I understand this will wipe the phone, but then will a nandroid backup reinstall everything on top of the CSC or well a nandroid replace the CSC? Will/should I have issues with a TMO fw/bl and non-TMO CSC?
CSC is a custom sales code. You can try changing it but I don't think this will help because the phone's software works with the installed modem software. Changing the csc doesn't change the modem software.
I thought the modem, to speak generally, was the set of drivers needed for everything to communicate correctly, while the CSC was the region and brand-specific coding that include the bands in which the hardware should search. Not correct? There are other stories of people flashing different region files and then have access to other bands.
The CSC is something added to the ROM to make it carrier specific. For instance, adding a T-Mobile USA CSC to an AT&T Samsung s4 will not allow the S4 to connect to T-mobile's network. Additional software modifications must be made to enable these additional frequency bands.
You can try to change the CSC but the CSC must exist for the particular carrier on the particular phone.
The good thing is that, from what I've read, there exists an international note 3 on 3's network. Does that mean, since it exists, I need to flash the international fw/bl and csc? I think it's the 9005.
The n9005 and T-Mobile note 3 support different frequencies and the n9005 has never been able to receive LTE in North America, regardless of what is done through software changes.
You will not be able to flash the bootloader via Odin but you may be able to flash it via TWRP. However, flashing an n9005 bootloader onto the n900t will probably hardbrick the phone and I advise against cross-flashing bootloaders.
"Hard-brick" as in unrecoverable or I'll just have to start over?
Hard brick means having it fixed at a repair shop, if possible.
Hi guys,
I need your help: I get a Galaxy S9 with active CSC set in SMP (it is an unknown version because it's a sample).
I flashed a multi CSC firmware SM-G960F because I need an ITV (Italy) CSC on it (I want OTA and also Samsung Pay Service).
I don't know why, but when I flash the CSC it set automatically on Germany/DE Status with no chance to change it. The Active CSC remains SMP and CSC Status sets into Germany/DE.
I'm sure I've downloaded from Updato the ITV version of the firmware.
In the past years it was very simple because it need only the correct firmware of your country region to solve the problem. But now with this damn Multi CSC it is impossible!
I tried many ways and guides found here but no one solved the problem.
I wanna change it without rooting the device.
Any suggestions?
Thank you so much in advance
iorya984 said:
Hi guys,
I need your help: I get a Galaxy S9 with active CSC set in SMP (it is an unknown version because it's a sample).
I flashed a multi CSC firmware SM-G960F because I need an ITV (Italy) CSC on it (I want OTA and also Samsung Pay Service).
I don't know why, but when I flash the CSC it set automatically on Germany/DE Status with no chance to change it. The Active CSC remains SMP and CSC Status sets into Germany/DE.
I'm sure I've downloaded from Updato the ITV version of the firmware.
In the past years it was very simple because it need only the correct firmware of your country region to solve the problem. But now with this damn Multi CSC it is impossible!
I tried many ways and guides found here but no one solved the problem.
I wanna change it without rooting the device.
Any suggestions?
Thank you so much in advance
Click to expand...
Click to collapse
Apparently it's impossible to get around it because of this multi CSC no matter what firmware you flash it will not get rid of the carrier firmware on the phone.
qualcomm 9650ds, flashed a multi csc firmware, a window popped up:
SIM card change Restart your phone to configure the functions compatible with your new SIM card. This will reset the phone to its default settings and delete all data, including files and downloaded applications. NOW NO RESTAB. AND RESTART
After restarting, the correct csc has been read. (probably has something to do with the Sim card)
PS: if chosed now no, the 4g signal bar showed LTE; if yes, the bar showed 4g
Click to expand...
Click to collapse
Click to expand...
Click to collapse
kevinfan1990 said:
qualcomm 9650ds, flashed a multi csc firmware, a window popped up:
SIM card change Restart your phone to configure the functions compatible with your new SIM card. This will reset the phone to its default settings and delete all data, including files and downloaded applications. NOW NO RESTAB. AND RESTART
After restarting, the correct csc has been read. (probably has something to do with the Sim card)
PS: if chosed now no, the 4g signal bar showed LTE; if yes, the bar showed 4g
Click to expand...
Click to collapse
For the SM-G9650DS, would you mind sharing which multi-csc firmware did you use exactly? which CSC are you on?
Hello to everybody,
I have a Galaxy S9, model SM-G960N and finally the Korean Update to Android 10 arrived, downloaded it from SamMobile (The unbranded version KOO) Flashed it without problems and the phone works as intended. Only it doesn't have KOO as CSC, it has SKC, which has bloatware and it isn't the one I flashed. What gives? Why does it do that, are there any workarounds? Here's what I've tried until now:
Downloaded, and flash numerous times, no result, I don't live in Korea, I don't have a Korean SIM, phone still reports SKC.
Flashing with or without sim card inserted gives the same result.
Can't flash any other CSC, other than Korean ones, Odin spits out an error and it does not even start the flashing process.
Mix and matching different CSC with different firmware's obviously not successful.
Any idea if something can be done about this?
Thank you in advance.
You need to root it and change CSC with phone info app to KOO
numpea said:
You need to root it and change CSC with phone info app to KOO
Click to expand...
Click to collapse
I guess that's the only remaining way, but do you know why it picks SKC instead of KOO, even if the firmware that I'm downloading is KOO.
Korean CSC is a multiCSC even if you download KOO firmware you phone will use SKC that's included in the CSC so there is no different korean csc there's only one that includes the 4 csc codes
i have rooted device but i need multilanguage. ho i can debrand or add orginal languages?
tejanaqkilica said:
Hello to everybody,
I have a Galaxy S9, model SM-G960N and finally the Korean Update to Android 10 arrived, downloaded it from SamMobile (The unbranded version KOO) Flashed it without problems and the phone works as intended. Only it doesn't have KOO as CSC, it has SKC, which has bloatware and it isn't the one I flashed. What gives? Why does it do that, are there any workarounds? Here's what I've tried until now:
Downloaded, and flash numerous times, no result, I don't live in Korea, I don't have a Korean SIM, phone still reports SKC.
Flashing with or without sim card inserted gives the same result.
Can't flash any other CSC, other than Korean ones, Odin spits out an error and it does not even start the flashing process.
Mix and matching different CSC with different firmware's obviously not successful.
Any idea if something can be done about this?
Thank you in advance.
Click to expand...
Click to collapse
i've to face the same thing mine is KTC but it shows SKC. idk what to do after did that always my device is getting overheat
I Have an Unlocked S20 Ultra 5G from samsung. a while back flashed the t-Mo firmware to have 5G SA access. flahsed the lastest update BTIE. I also have a line with AT&T and decided to try that in my phone and test out their 5G. so i put my sim in and changed my CSC to ATT using the dialer *#272*IMEI# and all was well. went to switch back and didnt think and i selected XAA. now my phone is stuck on XAA, and the csc dialer code no longer works and neither does the *#BAND# dialer code. I have even tried to do a clean flash in odin with the csc file not home-csc and neither one works and im still stuck in the XAA/XAA/XAA.
anyone have any idea how i can get it back to how it was?
weasel18 said:
I Have an Unlocked S20 Ultra 5G from samsung. a while back flashed the t-Mo firmware to have 5G SA access. flahsed the lastest update BTIE. I also have a line with AT&T and decided to try that in my phone and test out their 5G. so i put my sim in and changed my CSC to ATT using the dialer *#272*IMEI# and all was well. went to switch back and didnt think and i selected XAA. now my phone is stuck on XAA, and the csc dialer code no longer works and neither does the *#BAND# dialer code. I have even tried to do a clean flash in odin with the csc file not home-csc and neither one works and im still stuck in the XAA/XAA/XAA.
anyone have any idea how i can get it back to how it was?
Click to expand...
Click to collapse
Probably have to use Samkey
I would appreciate if anyone can point me to the right direction. I have 21FE G990U2 from AT&T, It is unlocked by AT&T.
All I need is working T-Mobile firmware or Samsung (no carrier branding) to flash. I tried multiple versions of U, U1 and U3 firmwares (all matching my current Binary -4) but no success.
I just would like to get rid of ATT bloat. I know I can uninstall it via ADB but I rather have firmware clean of it.
Any suggestion please?
Thanks
So am I right to assume that you are looking for a G990U2 TMB firmware with Binary 4, to flash on a G990U2 AT&T phone?
If so, then you can download it from the below link by clicking on "Download Samfw server" (G990U2OYN4EWC3, April 2023 update):
Download Galaxy S21 FE 5G SM-G990U2 (TMB) G990U2SQS4EWC3 in Samfw - Samsung firmware download
Galaxy S21 FE 5G SM-G990U2 (TMB - United States) G990U2SQS4EWC3 T(Android 13) samsung firmware download all model, lastest, fast update, completely free and fast speed in Samfw.com ✅
samfw.com
or if I am assuming wrong, can you please correct my understanding? As I do not have any practical hands-on experience with the USA models.
Shuhan44 said:
So am I right to assume that you are looking for a G990U2 TMB firmware with Binary 4, to flash on a G990U2 AT&T phone?
If so, then you can download it from the below link directly (G990U2OYN4EWC3, April 2023 update):
https://02-samsung.cloud/v2/IxJCDiMnLh8SLAo5IRtBAzwDMyMyCB4lFzssIDs2ByAzMUEgOzEUQDMQMCMBOyw/LiUzJjIXCDkuJC8/NDseIy8xIQYzOAIlPDAVHRIvMz81CAIkMwsuOB42FA00Nh4LNS8vFjIXLA0NFzE/PAMeOTMADTkDAC4mNBEaMCExQQEhJQUUHjFCMTs4BkIjCyI/Iws8MQEWCDAeCw0xCREHOTQbIyshAD4OIQAGLC44Hiw0ER4OMiUzLDIlDSs8AD4fJhsGOg8HCkA8AywnCRc+Di8LBxAzBy4RDxYpKTwkHjUeBylCJgceKTIXIUAJER4OMi8+AwMSMBsBAzY5LwNBJi8IMAQ4MTQUAQMgLyMsHjM7JDMHLzEjJDgAISk8PxQ9NTggQiYbLyUhJCEpMjsHJzw2KSceFy4QIzEvKw8WIAYhFh4JMjAeLDQsLCM0Gy45IzgGQiMDPB0jJCI/ARYFMCMiExM=
or if I am assuming wrong, can you please correct my understanding? As I do not have any practical hands-on experience with the USA models.
Click to expand...
Click to collapse
You are correct - I need T-Mobile (or carrier free) so I can utilize full carrier settings.
Thanks for the link, however above link gives an error when opening the page.
Nevertheless I will look for TMB firmware with CSC: G990U2OYN4EWC3 and post an update here
Flashed that and still has AT&T boot logo and all the apps
h078 said:
Flashed that and still has AT&T boot logo and all the apps
Click to expand...
Click to collapse
Well, I am sure that you have flashed by a Factory reset (Flashed CSC, not Home CSC in ODIN). The boot logo can be changed by rooting your device, also bloatware apps can be deleted via ADB command without rooting.. but you already have mentioned that you prefer not to proceed with those processes. So I am out of suggestions, sorry.
Just for my knowledge, after flashing the TMB firmware, now your settings> About phone> software information> service provider software version: 2nd line shows as TMB/ TMB/ AT&T?
(Also corrected the download link in my previous comment anyway).
Yes, you are correct i did flash CSC, not home CSC. Then I reflashed w home CSC but software still says ATT/ATT/ATT.
Moreover on Bootloader screen says "carrier ATT" - I have never seen that before on any Samsung phone that I had. I have no clue how did they lock up device that well. As for removing software via ADB that is not a problem, but ATT locks network selection mode so you cant choose between 5G, LTE, 3G etc..
TMobile in US still supports EDGE and sometimes it comes handy - whereas ATT has only LTE and 5G as they re-farmed EDGE and 3G/HSPA frequencies
h078 said:
Yes, you are correct i did flash CSC, not home CSC. Then I reflashed w home CSC but software still says ATT/ATT/ATT.
Moreover on Bootloader screen says "carrier ATT" - I have never seen that before on any Samsung phone that I had. I have no clue how did they lock up device that well. As for removing software via ADB that is not a problem, but ATT locks network selection mode so you cant choose between 5G, LTE, 3G etc..
TMobile in US still supports EDGE and sometimes it comes handy - whereas ATT has only LTE and 5G as they re-farmed EDGE and 3G/HSPA frequencies
Click to expand...
Click to collapse
I do not get why the CSC can never be changed, even after flashing the complete firmware... must be an ATT thing!
Anyway, to change the csc only, there is another very quick & easy method. It takes only 2/3 minutes; no flash or factory reset is required. You have to download and install a small software "SamFW Tool" on your pc/laptop (may need to disable the antivirus during the download/install process). Once done, connect the phone and enable USB debugging mode. Open the software, under the ADB tab, click Change CSC, from the dropdown list select TMB and click Change. The phone will restart and CSC "Should" change to TMB/TMB/ATT.
Here is the download link for the software:
https://www.mediafire.com/file/upaiwadhmstm6js/SamFwToolSetup_v4.6.zip/file
That did the trick. I have T-Mobile CSC now
Thanks a lot
h078 said:
That did the trick. I have T-Mobile CSC now
Thanks a lot
Click to expand...
Click to collapse
Great!
But still, that's only one part of the final solution I think. Your target was to replace the complete firmware from ATT to TMB, right? Since the CSC is now changed to TMB, I think you can give it another try via ODIN to install the TMB firmware now (only if you want). I am not confident that it will work now, but still, one last try should not be much of a hassle.
I think that these multi CSC contain all US carrier customizations....When I changed it to TMB it shows TMB/TMB/ATT and loads bootlogo as well as TMobile apps... I guess it is similar as Blackberry used to be back in the days...Depending which carrier SIM used it loaded proper settings from the firmware...
I have flash my METROPCS G990U2 to G990U3,other sim card work fine,but t mobile sim card does not work ,can someone help me?I already change CSC to xxa,but still no internet,I do have sginal bar