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[HOW TO] VoLTE on Jio India - USA Snapdragon S7 S7edge

New instructions dated Sept 15th 2018
No root needed.
Should work on all Snapdragon USA/Canada etc models (ATT , verizon, sprint, tmobile tc) S7 or S7edge (though the file is from S7edge India model). Leave a message in this thread if you encounter any issues.
Am not responsible for any damage you might do to your device.. am just trying to help.
Keep your Jio SIM in the phone all along.
1. Back up your data using Samsung smart switch or any other means (save whatsapp chats to google in settings)
2. Flash stock firmware (On unzipping stock FW, you'll get AP, CP,BL and CSC files. Use Odin to flash them) (Don't flash User data file if it's there in extracted files) - Download from Updato site for faster downloads
Use recommended patched Odin is located here
3. Download the Indian CSC file G935F_INSCSC
4. Ignore this step if you have adb working on your PC already.
Install "minimal ADB fastboot" program on PC, Copy the G935F_INSCSC.zip to your minimal ADB folder on computer (under program files on C drive).
Double click cmd-here.exe in that folder.
5. Boot the phone to recovery mode and choose Apply update via ADB sideload
6. Connect your phone to your computer with your USB cable.
7. On ADB window on PC type "adb devices" without quotes. Next line should show a device attached
If seen, type "adb sideload G935F_INSCSC.zip" without qoutes. It'll start transferring the file.. check mobile screen it'll install itself. (you might see some errors)
8. Reboot file and check, you should have Volte.
Possible errors:
1. Phone app/Msg app force closing
Try SMS app from google
Reflash AP BL CP only excluding CSC
Install CSC zip via adb again
2. Sprint OMADM app needs to be removed to avoid annoying notification or change notifications to low priority
To remove via ADB, turn on usb debugging
type in adb shell
you should see a dollar sign.
next type in pm uninstall -k --user 0 com.sec.omadmspr
it should say success.
ADB sideloading is explained in this video in the last https://youtu.be/giD7nP4Oue4
Old instructions have been deleted....
Thank you Proper vlog on youtube for testing my method and reporting.

Bro it will work on any coustom rom

Himan99 said:
Bro it will work on any coustom rom
Click to expand...
Click to collapse
This is only for USA S7E models being used in india on Jio.

Will you able to get OTA updates ?

nimms said:
For S7 edge :
Click to expand...
Click to collapse
I cant add any cards to my Samsung Pay after installing your package
And for S7 UFirm_INS_Hybrid_NoNaMe_PS_BS_Free_G930U_QE2_V2 zip
I see the device security been disabled and when i try to open it , it force closes . does this means Knox is disabled and thats why i am not able to add any cards in samsung pay ?
Can you please help? . I need to have samsung pay working ?
Is the CSC file you included only take care of Jio VoLTE or stuffs with all operators ? . I hear that Airtel is even testing VoLTE.

yakaaithiri said:
I cant add any cards to my Samsung Pay after installing your package
And for S7 UFirm_INS_Hybrid_NoNaMe_PS_BS_Free_G930U_QE2_V2 zip
I see the device security been disabled and when i try to open it , it force closes . does this means Knox is disabled and thats why i am not able to add any cards in samsung pay ?
Can you please help? . I need to have samsung pay working ?
Is the CSC file you included only take care of Jio VoLTE or stuffs with all operators ? . I hear that Airtel is even testing VoLTE.
Click to expand...
Click to collapse
I've only tested till login. Tried to add card after reading your comment. I too had connection error. I've only changed CSC in that file. US guys didn't have any issues it seems.
I can't open some pages on spay too.. not sure if it's related to Samsung servers or our device. I'll check later.
If it were related to knox issue, it won't even let you login. (Like on a rooted device).
VoLTE is related to CSC and device model. So it should work with airtel too. Lets see.

nimms said:
I've only tested till login. .
Click to expand...
Click to collapse
Thanks for letting me know.
I will also try with a clean install of the system without removing any bloats and check.
You also try and keep posted. If you want me to try something on this , let me know.
BTW , do you have the latest csc files for india thats ODIN flash-able ?
Also will it be an issue because of the samsung pay framework. I hrd that it need Indian framework and India spay app for successful adding of our cards.
Do you have any idea as how to bring spay India framework to this rom ?

Thank you for the input man.
I just wonder if the CSC is CPU dependent? Since I want to modify it with a CSC for HongKong, I am not sure if it matters for Exynos / Snapdragon rom.
Or would you mind help me to modify the file with Hong Kong CSC for me? thank you very much!

cn2661 said:
Thank you for the input man.
I just wonder if the CSC is CPU dependent? Since I want to modify it with a CSC for HongKong, I am not sure if it matters for Exynos / Snapdragon rom.
Or would you mind help me to modify the file with Hong Kong CSC for me? thank you very much!
Click to expand...
Click to collapse
CSC is not dependent on processor as long as it's flashed via twrp/flashfire as a zip. But odin flashing is different.
So, which is your device? if it's SM-G935F/FD/K/L/S/W8 then use https://forum.xda-developers.com/s7-edge/development/utility-flashable-csc-selection-30-t3392957 TGY is in that zip.
If your's is a snapdragon, i'll help.

nimms said:
CSC is not dependent on processor as long as it's flashed via twrp/flashfire as a zip. But odin flashing is different.
So, which is your device? if it's SM-G935F/FD/K/L/S/W8 then use https://forum.xda-developers.com/s7-edge/development/utility-flashable-csc-selection-30-t3392957 TGY is in that zip.
If your's is a snapdragon, i'll help.
Click to expand...
Click to collapse
Thanks for the reply my friend.
Mine is a Snapdragon US AT&A variant, G935A on 935U Firmware.

Hong Kong TGY CSC for S7 S7E or S8 S8+ USA variants
cn2661 said:
Thanks for the reply my friend.
Mine is a Snapdragon US AT&A variant, G935A on 935U Firmware.
Click to expand...
Click to collapse
You need to follow the same procedure as india but with your CSC specific zip... UFirm_TGY_Hybrid_QE2_V3
Please report after testing. Hit thanks if it works. Again credits to the original zip creator.. i just modified it.

nimms said:
You need to follow the same procedure as india but with your CSC specific zip... UFirm_TGY_Hybrid_QE2_V3
Please report after testing. Hit thanks if it works. Again credits to the original zip creator.. i just modified it.
Click to expand...
Click to collapse
Thank you so much!!!
I will download the file first and give it a try at weekend.:laugh:
*So basically, If I just want VOLTE and want to keep ROOT (i.e. not needing the NoNaMe Modifications), I just need to flash the TGY Mod pack as instructed?

cn2661 said:
Thank you so much!!!
I will download the file first and give it a try at weekend.:laugh:
*So basically, If I just want VOLTE and want to keep ROOT (i.e. not needing the NoNaMe Modifications), I just need to flash the TGY Mod pack as instructed?
Click to expand...
Click to collapse
Just try flashing without wipes in aroma.

Hello! does anyone have odin Indian csc file .

nimms said:
Just try flashing without wipes in aroma.
Click to expand...
Click to collapse
Hi, I just did as what was instructed.
After I have gone throught the Auroma screen, having checked No Wiping and Keep SU, ticked what to debloat,
it says finished and restarted.
1. When it was rebooting, it keep popping up com.sec.epdg has stopped, IMS Service stopped.
Is that normal or what else should I do?
2. I also noticed the modified file for India is over 500mbs, but the TGY file for Hong Kong is just 153mb.
Is everything alright about that?
3. When I try to Odin a stock G935U firmware wiping everything, it turns into Olympic Edition Theme, and I lost my IMEI , cannot detect a Sim. There is no way for me to get it working again
thank you again.

cn2661 said:
Hi, I just did as what was instructed.
After I have gone throught the Auroma screen, having checked No Wiping and Keep SU, ticked what to debloat,
it says finished and restarted.
1. When it was rebooting, it keep popping up com.sec.epdg has stopped, IMS Service stopped.
Is that normal or what else should I do?
2. I also noticed the modified file for India is over 500mbs, but the TGY file for Hong Kong is just 153mb.
Is everything alright about that?
3. When I try to Odin a stock G935U firmware wiping everything, it turns into Olympic Edition Theme, and I lost my IMEI , cannot detect a Sim. There is no way for me to get it working again
thank you again.
Click to expand...
Click to collapse
1.Edge closing might happen on first boot. did it FC even after a restart?
2.India file had S8 apps and Google play apps and your file did not.
3.Olympic theme could be a default for your CSC and please flash Your region CP file or U version CP file and see about that IMEI issue. if all fails, do a total clean flash of U firm with CSC and tick repartition in Odin. (not home csc)

nimms said:
3.Olympic theme could be a default for your CSC and please flash Your region CP file or U version CP file and see about that IMEI issue. if all fails, do a total clean flash of U firm with CSC and tick repartition in Odin. (not home csc)
Click to expand...
Click to collapse
Sigh, no luck
I been using various versions of Odin and Various version of Firmware, including MM and Nougat, G935A / T/ U,
Also I tried to tick Re-Partition, Wipe NAND.
I also even tried the INDIA CSC file on the OP and the original NoNaMe Mod file.
Still, it says SIM Card Not Available, IMEI Unknown, Baseband Unknown, No Network. It used to work fine before trying the TGY CSC.

cn2661 said:
Sigh, no luck
I been using various versions of Odin and Various version of Firmware, including MM and Nougat, G935A / T/ U,
Also I tried to tick Re-Partition, Wipe NAND.
I also even tried the INDIA CSC file on the OP and the original NoNaMe Mod file.
Still, it says SIM Card Not Available, IMEI Unknown, Baseband Unknown, No Network. It used to work fine before trying the TGY CSC.
Click to expand...
Click to collapse
Try samsung smartwitch emerrgency recovery mode once.

nimms said:
Try samsung smartwitch emerrgency recovery mode once.
Click to expand...
Click to collapse
Smartswitch detected my phone but says G935A is not supported.
Finally, I approached a phonedealer in China online.
He fixed my phone remotely via Teamviewer, and he said the Certificate of Modem/Baseband was corrupted. Since the Baseband gone missing which cannot be fixed by ordinary Odin of Firmware.
I saw him used some kind of unofficial software (characters illegible to me) and got it fixed in 2 minutes, and was luckily costed me only 220RMB (around 30USD)
Well, a good lesson to learn from. There are really something not fixable by Odin and we could Eff our phone up even with the bootloader locked.
Again, it was just me requesting the OP to modify the file for me to satisfy my curiousity who happily did me a favour, there is nothing to blame with and I thank you again for all the help!
Cheers!

cn2661 said:
Smartswitch detected my phone but says G935A is not supported.
Finally, I approached a phonedealer in China online.
He fixed my phone remotely via Teamviewer, and he said the Certificate of Modem/Baseband was corrupted. Since the Baseband gone missing which cannot be fixed by ordinary Odin of Firmware.
I saw him used some kind of unofficial software (characters illegible to me) and got it fixed in 2 minutes, and was luckily costed me only 220RMB (around 30USD)
Well, a good lesson to learn from. There are really something not fixable by Odin and we could Eff our phone up even with the bootloader locked.
Again, it was just me requesting the OP to modify the file for me to satisfy my curiousity who happily did me a favour, there is nothing to blame with and I thank you again for all the help!
Cheers!
Click to expand...
Click to collapse
Sorry about that but the file will touch only CSC part. not basebands/modem. I've re-checked the zip too.
Not sure what happened.. I could even flash Exynos CSC file via flashfire on Snapdragon. No damage at all.
May be am just lucky.

Changing Firmware (To switch carriers) *Is it possible using S8 method*

Hello,
So I have been doing research about fully switching (FIRMWARE) from Sprint to T-Mobile-
I came across a guide for the S8 so I was wondering if the same could be applied to the S6 to have a truly "switched" carrier phone?
If anyone has any other information please feel free to share/respond.
Thanks!
Following Post: Thanks to By juvemex for posting
Original Post found Here: https://forum.xda-developers.com/galaxy-s8/how-to/switch-to-carrier-firmware-100-t3609487
thanks to everyone here the best way was found to switch carriers thanks to mweinbach for your step by step tut works perfect now lets get root!!
Steps (Keep in mind this is posted for Galaxy S8 so have to change FIRMWARE etc.
How to change carrier:
1. Download Factory Binary, EngBoot, and the G950W firmware. (i dont think engboot is needed i did it without eng boot and works)
2. Turn off phone
3. Hold down on Bixby button + power + volume down
4. open Odin v3.12.7
5. add the Factory Binary to the AP section of Odin.
6. Plug your phone into your computer (NEEDS TO BE WINDOWS) with Odin open
7. Make sure your device is connected and recognized by Odin.
8. Click start.
9. One the phone reboots run the ADB command, adb reboot bootloader
10. Open modded Odin and flash the EngBoot
11. Click start
12. Once the phone reboots type the command adb reboot bootloader
13. Put the HOME_CSC of the G950W firmware into the CSC part of Odin (unmodded)
14. Click start
15. Open IME setting on Factory Binary
16. Type in *#243203855#
17. Select XAC
18. Click install
19. Wait for phone to reboot
20. Once it does open terminal and type in adb shell
21. Then type in echo "XXX" > /efs/imei/mps_code.dat
22. Type in exit into adb shell
23. Type in adb reboot bootloader
24. Flash the G950U firmware of your choosing without Userdata. Also make sure to flash the non-home CSC
25. Enjoy your new carrier!
CSC Values (replace on of these with the "XXX" in step 21):
BST Boost
VZW Verizon
ATT ATT
USC US Cellular
ACG C Spire
TMK MetroPCS
VMU Virgin Mobile
TFN Tracfone
XAS Sprint
TMB T-Mobile
XAA Unlocked US
SPR Sprint
CCT Xfinity Mobile
Don't entirely know which ones these are:
GCF World Wide
ACG Some Mid West Carriers
LRA A bunch, cant figure it ou

Anyone know? Or has no one tried?
I am going to go through the process hopefully on Sunday and will post my findings

Hey
thsalespts said:
Anyone know? Or has no one tried?
I am going to go through the process hopefully on Sunday and will post my findings
Click to expand...
Click to collapse
Did you find out anything? I dont think it can work but im interested

Samsung Galaxy A8 2018 UAE Version Volte Issue In India

Has anyone succeeded in enabling volte for this model. Especially in India it doesn't work with Reliance Jio simcard.
Can someone advice about this?

How to change CSC on A8/A8+ 2018
lego09 said:
Has anyone succeeded in enabling volte for this model. Especially in India it doesn't work with Reliance Jio simcard.
Can someone advice about this?
Click to expand...
Click to collapse
I imagine you need to change your phone CSC's. To do that you need a PC with Windows and an internet connection (you need Latest Odin3 and Samsung USB Drivers), your Galaxy A8 with its USB-C to USB cable, latest official firmware for your model and csc and the Factory Firmware tar for your phone and with correct bootloader rev (to know what's your current bl rev download "Phone Info ☆Samsung☆" app from Play Store and check your Bootloader version inside it, the bootloader rev is after the phone model number and fw country/type; ex. A530FXXU3):
- A530F Rev 1
- A530F Rev 2
- A530F Rev 3
- A730F Rev 1
- A730F Rev 2
- A730F Rev 3
If you downloaded and installed all the needed, do a backup of all your data and files, then follow those steps:
1. Boot your phone in Download mode
2. Open Odin3 as Administator, go in "Options" tab and enable Auto Reboot and Re-Partition, then click on the AP button and select the COMBINATION tar file you downloaded previously
3. Connect your phone to your pc and click the Start button in Odin3, flash should start
4. You phone now should boot in Factory Firmware. Select IMEI option at the bottom of the screen to bring up the dial pad, then dial *#243203855#
5. Select your new CSC code (in your case INS) and wait for it to install and reboot
6. Wait for phone to reboot and do a Factory Reset in Settings app
7. Reboot to Download mode again and setup Odin3 like before
8. You now need to flash your official firmware, so put all the tars from the firmware you downloaded on their section (AP inside AP, BL inside BL, CP inside CP and CSC inside CSC)
9. Connect back your phone in your pc and click Start in Odin3
Your phone should now be back to the Stock Firmware and with the correct CSC set, to check it go inside Settings>About phone>Software info>Service provider SW ver. and check if the first CSC sales code matches the one you choosen previously.
Greetings!

BlackMesa123 said:
I imagine you need to change your phone CSC's. To do that you need a PC with Windows and an internet connection (you need....Greetings!
Click to expand...
Click to collapse
Thanks for your detailed reply. Unfortunately there is no official INS firmware available for this model as it's not been launched in India. I tried flashing it with other countries firmware but it didn't work. Is there any other way?

lego09 said:
Thanks for your detailed reply. Unfortunately there is no official INS firmware available for this model as it's not been launched in India. I tried flashing it with other countries firmware but it didn't work. Is there any other way?
Click to expand...
Click to collapse
You can try to flash A530F AP, BL, CP tars with A730F INS CSC tar. If it doesn't works you unfortunately need to root your device to install the correct csc in system (the guide I explained before is for non-rooted devices)

BlackMesa123 said:
You can try to flash A530F AP, BL, CP tars with A730F INS CSC tar. If it doesn't works you unfortunately need to root your device to install the correct csc in system (the guide I explained before is for non-rooted devices)
Click to expand...
Click to collapse
Thanks again. Should I wipe all the data before doing this?

lego09 said:
Thanks again. Should I wipe all the data before doing this?
Click to expand...
Click to collapse
Data is wiped anyway during the guide, so as you wish lol

BlackMesa123 said:
Data is wiped anyway during the guide, so as you wish lol
Click to expand...
Click to collapse
Wasn't successful. So doing rigorous R&D.

Has anyone succeeded by rooting the device? @BlackMesa123 can you suggest on this?

lego09 said:
Has anyone succeeded by rooting the device? @BlackMesa123 can you suggest on this?
Click to expand...
Click to collapse
It's like one month we are behind it actually lol, but since recently you can finally root safely your device with flashing my TWRP 3.2.3+Magisk v17.1. Would suggest to flash my custom kernel also (MCK), but I wanna suggest to wait till' next version comes out since there will be a lot of under-the-hood improvements over the current version (v1.2)

Updates
Hi,
Any luck regarding this?

Anson paul said:
Hi,
Any luck regarding this?
Click to expand...
Click to collapse
As I said previously, you need to set the correct CSC sales code in your device in order to get the features you need for your country/SIM. To do that you can follow the guide I wrote above or, if you're rooted, you just can edit the "/efs/imei/mps_code.dat" file and replace the current CSC with the one you prefer.

Just to say I on honk Kong but I modified a USA s8 csc and I have had voltie working.
Screenshot below.

mchlbenner said:
Just to say I on honk Kong but I modified a USA s8 csc and I have had voltie working.
Screenshot below.
Click to expand...
Click to collapse
How did u do that? Can u explain the steps?

My mod would only work on t.mobile USA.
I not going to try to teach people how to mod or hack.
If not done right it will brick you.

mchlbenner said:
My mod would only work on t.mobile USA.
I not going to try to teach people how to mod or hack.
If not done right it will brick you.
Click to expand...
Click to collapse
OK, so carrier locked a8 2018 model?

I bought a8 2018 from indonesia unlocked but VOLTE is not working in India. Any suggestions on how to get VOLTE working?

Since CSC change is not possible with latest UI 3.1 update what are options to change CSC

HI all,
With CSC change not possible using codes with latest UI 3.1 update what are options to change CSC?
For ex. I have SM-N986U unlocked Tmobile device but i changed CSC to ATT as im currently using ATT Prepaid and I'm on latest Apr update for ATT
How can i revert back to Tmobile CSC?
Do i need to flash Tmobile firmware using ODIN by first flashing to U1 firmware then Tmobile firmware or can i directly flash Tmobile latest firmware with Apr update using ODIN?
Will i be able to retain my app and data if I flash Tmobile firmware?
Any help will be appreciated.
Thanks

So you state csc change not possible then ask how to change it? lol.. and if it were as easy to just flash firmware in odin tgen that wouldve been the way to do it to begin with I would think lol

Update:
I was able to change CSC(ATT/ATT/TMB) to TMB/TMB/TMB but it was long and winded way. Just flashing firmware was not enough , need Tmobile sim to install carrier service and change CSC.
I followed the steps below:-
1) Did backup of my device using Smart Switch and removed my ATT sim.
2) Flashed latest T-Mobile firmware( N986USQU2DUC8 ) using instructions from post - https://forum.xda-developers.com/t/ota-and-non-ota-firmware-for-n986u-and-n986u1.4143833/ . Also, downloaded the ODIN (patched version) and T-Mobile firmware from links in the post. Flashed HOME_CSC too.
3) After rebooting phone with new firmware , the boot up screen was still ATT and CSC was still ATT/ATT/TMB.
4)Shut down phone and inserted Tmobile SIM i had lying around.
5) On reboot, i was asked to install Tmobile carrier services and on restart , Tmobile logo came on boot up with CSC changed to TMB/TMB/TMB.
6) Now, i have esim enabled and SIM manager showing up too.

mindseye0803 said:
Update:
I was able to change CSC(ATT/ATT/TMB) to TMB/TMB/TMB but it was long and winded way. Just flashing firmware was not enough , need Tmobile sim to install carrier service and change CSC.
I followed the steps below:-
1) Did backup of my device using Smart Switch and removed my ATT sim.
2) Flashed latest T-Mobile firmware( N986USQU2DUC8 ) using instructions from post - https://forum.xda-developers.com/t/ota-and-non-ota-firmware-for-n986u-and-n986u1.4143833/ . Also, downloaded the ODIN (patched version) and T-Mobile firmware from links in the post. Flashed HOME_CSC too.
3) After rebooting phone with new firmware , the boot up screen was still ATT and CSC was still ATT/ATT/TMB.
4)Shut down phone and inserted Tmobile SIM i had lying around.
5) On reboot, i was asked to install Tmobile carrier services and on restart , Tmobile logo came on boot up with CSC changed to TMB/TMB/TMB.
6) Now, i have esim enabled and SIM manager showing up too.
Click to expand...
Click to collapse
thats the normal process.. that firmware is same for each carrier.. firmware is multi csc which changes based on sim inserted.. shouldnt have to go through all of that really.. i think most ppl who have issues are trying to change csc without a active sim card or on carrier locked devices etc.
glad u figured it out tho!

elliwigy said:
thats the normal process.. that firmware is same for each carrier.. firmware is multi csc which changes based on sim inserted.. shouldnt have to go through all of that really.. i think most ppl who have issues are trying to change csc without a active sim card or on carrier locked devices etc.
glad u figured it out tho!
Click to expand...
Click to collapse
Well, the confusion for most ppl who are new to Samsung and CSC, like me , is that we could change CSC with code earlier and now cannot. Didn't have these issues with pixel and iPhone.

mindseye0803 said:
Well, the confusion for most ppl who are new to Samsung and CSC, like me , is that we could change CSC with code earlier and now cannot. Didn't have these issues with pixel and iPhone.
Click to expand...
Click to collapse
pixel and iphone dont have multi csc like samsung does.. just curious, when were u able to change csc with code earlier if ur new to samsung? lol

elliwigy said:
pixel and iphone dont have multi csc like samsung does.. just curious, when were u able to change csc with code earlier if ur new to samsung? lol
Click to expand...
Click to collapse
Yes, I was able to change CSC to ATT from TMobile, enable all LTE/5G bands before One UI update.Not, sure what u find so funny .
Yes, I'm aware that there is no CSC concept in pixel or iPhone or any other other manufacturer that I'm aware nor they are crippled in terms of hardware capability from carrier software like Samsung. LTE/5G bands not being enabled , esim not being enabled etc.

mindseye0803 said:
Yes, I was able to change CSC to ATT from TMobile, enable all LTE/5G bands before One UI update.Not, sure what u find so funny .
Yes, I'm aware that there is no CSC concept in pixel or iPhone or any other other manufacturer that I'm aware nor they are crippled in terms of hardware capability from carrier software like Samsung. LTE/5G bands not being enabled , esim not being enabled etc.
Click to expand...
Click to collapse
actually other devices are crippled in some cased disabled entirely.. for example u cant get a tmb oneplus 9 pro 5g and use it on verizon to get 5g bcuz vzw 5g bands are disabled in tmb variant..
its really the carriers to be honest..
and I say LOL all the time even in normal convo so not actually laughing sometimes, just say it out of habit

elliwigy said:
actually other devices are crippled in some cased disabled entirely.. for example u cant get a tmb oneplus 9 pro 5g and use it on verizon to get 5g bcuz vzw 5g bands are disabled in tmb variant..
its really the carriers to be honest..
and I say LOL all the time even in normal convo so not actually laughing sometimes, just say it out of habit
Click to expand...
Click to collapse
I have phones such as Z Flip3 5G and other models that do not change CSC like older models when following the flash procedure starting with U1, but the phones never prompt a restart. I have noticed it seems to be with TMB or VZW units. Any suggestion on how to actually get the CSC to change properly or is this something they are doing with new phones to avoid being able to use them fully on other carriers?

yygemmi770 said:
I have phones such as Z Flip3 5G and other models that do not change CSC like older models when following the flash procedure starting with U1, but the phones never prompt a restart. I have noticed it seems to be with TMB or VZW units. Any suggestion on how to actually get the CSC to change properly or is this something they are doing with new phones to avoid being able to use them fully on other carriers?
Click to expand...
Click to collapse
SamKey.org
Go to the page, download theirs Samkey app, buy few credits on Ebay and you can change the CSC as you wish in a minute, the phone will reboot without loosing your data, it's the easiest way as far as I know

Hi, I have yhe following issue and I need your thoughts please.
I have a Telus plan, canadian with US roaming option.
I am traveling in US alot. I have a Note 20 Ultra U1 from Samsung USA. When in US I can only register on Tmobile and I can get 5G icon too. Won't let me on ATT or Verizon.
With same sim card in Note20 Ultra "W" variant, canadian one, it wil register on all 3 major networks in US. No issues with the sim, I guess.
Also in Canada won't get 5G ever.
My provider said nothing to do with them, Samsung told me the same.
I reseted all network setings my APN is ok. VOLTE on. Only getting acces to Tmobile.
Any ideea how I can fix this ? Is it related to CSC ? Mine is XAA.

mindseye0803 said:
Update:
I was able to change CSC(ATT/ATT/TMB) to TMB/TMB/TMB but it was long and winded way. Just flashing firmware was not enough , need Tmobile sim to install carrier service and change CSC.
I followed the steps below:-
1) Did backup of my device using Smart Switch and removed my ATT sim.
2) Flashed latest T-Mobile firmware( N986USQU2DUC8 ) using instructions from post - https://forum.xda-developers.com/t/ota-and-non-ota-firmware-for-n986u-and-n986u1.4143833/ . Also, downloaded the ODIN (patched version) and T-Mobile firmware from links in the post. Flashed HOME_CSC too.
3) After rebooting phone with new firmware , the boot up screen was still ATT and CSC was still ATT/ATT/TMB.
4)Shut down phone and inserted Tmobile SIM i had lying around.
5) On reboot, i was asked to install Tmobile carrier services and on restart , Tmobile logo came on boot up with CSC changed to TMB/TMB/TMB.
6) Now, i have esim enabled and SIM manager showing up too.
Click to expand...
Click to collapse
So I have a Verizon phone and I switched to t-mobile. If I use this method to switch my csc would that lock my phone or would it stay unlocked?

Stevieboy02008 said:
So I have a Verizon phone and I switched to t-mobile. If I use this method to switch my csc would that lock my phone or would it stay unlocked?
Click to expand...
Click to collapse
Unlocked. Phone once unlocked will not lock to any carrier.

dadmi said:
Unlocked. Phone once unlocked will not lock to any carrier.
Click to expand...
Click to collapse
Thank you

(HELP)SM-N986U1 change CSC to TMB - Enable ESIm

Hey Everyone,
I have unlocked SM-N986U1 with the latest update installed (Updated with latest June update). I wanted to change my CSC to TMB (T-Mobile) so as to enable ESeim support. I tried using Samkey, wasted 1 credit too. It said CSC updated but nothing happened, my carrier still shows XAA.
Can anyone please guide me on how can I change CSC to TMB?
Thanks.

dawinner said:
Hey Everyone,
I have unlocked SM-N986U1 with the latest update installed (Updated with latest June update). I wanted to change my CSC to TMB (T-Mobile) so as to enable ESeim support. I tried using Samkey, wasted 1 credit too. It said CSC updated but nothing happened, my carrier still shows XAA.
Can anyone please guide me on how can I change CSC to TMB?
Thanks.
Click to expand...
Click to collapse
These links'could help. I think you have to flash the TMB Rom which enables and support the eSim on the phone. It would help to have a Tmobile Sim around during this process but I have heard others say it is not needed.
Note 20 Ultra eSIM update is here!! (T-mobile USA)
Guys, FINALLY!!! Woohoo! We have eSIM support on Note 20 Ultra US Snapdragon version for T-mobile. There is an OTA you can download and then convert your physical SIM to eSIM :)
forum.xda-developers.com
[Guide] - eSim Firmware Flash/ Odin Upgrade/ Flashing and N986U to N986U1 & Vice Versa
Instructions are updated to get eSIM INTRODUCTION - Firstly sorry for posting this as this is common knowledge for many. I still see so many people asking the same questions again and again and i do want to help so decided to write a guide. If...
forum.xda-developers.com

Mbetu said:
These links'could help. I think you have to flash the TMB Rom which enables and support the eSim on the phone. It would help to have a Tmobile Sim around during this process but I have heard others say it is not needed.
Note 20 Ultra eSIM update is here!! (T-mobile USA)
Guys, FINALLY!!! Woohoo! We have eSIM support on Note 20 Ultra US Snapdragon version for T-mobile. There is an OTA you can download and then convert your physical SIM to eSIM :)
forum.xda-developers.com
[Guide] - eSim Firmware Flash/ Odin Upgrade/ Flashing and N986U to N986U1 & Vice Versa
Instructions are updated to get eSIM INTRODUCTION - Firstly sorry for posting this as this is common knowledge for many. I still see so many people asking the same questions again and again and i do want to help so decided to write a guide. If...
forum.xda-developers.com
Click to expand...
Click to collapse
Thanks for the link to guide. I was going through it and there is a warning on the top saying if you have Bootloader 2 you won't be able to flash U firmware on U1. I believe as I have all the latest updates I wont be be able to flash it.
Thanks for your help.

dawinner said:
Thanks for the link to guide. I was going through it and there is a warning on the top saying if you have Bootloader 2 you won't be able to flash U firmware on U1. I believe as I have all the latest updates I wont be be able to flash it.
Thanks for your help.
Click to expand...
Click to collapse
Yes you can. My device is from Xfinity and I have done the switch to any Carrier I choose on bootloader 2. U1 to U and back is doable. The key is to use the modified Odin as specified in the guide.
"
2. Download Patched Odin here
3. Unpack/Unzip what you downloaded in Step 2 (Odin Compatible ROm) and put in a folder. Lets call the folder "Flash"
4. Run Odin, click on BL, Browse to the "Flash" folder, add BL file from there, Do the same for AP (click on AP, Add AP file, this will take some time), Same for CP (click on CP, Add CP file)
5. Do the same for CSC (click on CSC, Add the file with the name starting with Home_CSC). If you use Home_CSC your phone will not get formatted and data will remain Intact
USERDATA Stays empty.
6. Now connect USB cable to your laptop (Only laptop and not the phone)>> Turn off your phone >> Press volume up and volume down keep them pressed and plug in the USB type C into your phone.
7. You should be in download mode now, press volume up. In Odin you will see that phone is added.
8. Press start in Odin. Wait for it to finish and let the phone restart (it will happen On its own).
9. Done

Mbetu said:
Yes you can. My device is from Xfinity and I have done the switch to any Carrier I choose on bootloader 2. U1 to U and back is doable. The key is to use the modified Odin as specified in the guide.
"
2. Download Patched Odin here
3. Unpack/Unzip what you downloaded in Step 2 (Odin Compatible ROm) and put in a folder. Lets call the folder "Flash"
4. Run Odin, click on BL, Browse to the "Flash" folder, add BL file from there, Do the same for AP (click on AP, Add AP file, this will take some time), Same for CP (click on CP, Add CP file)
5. Do the same for CSC (click on CSC, Add the file with the name starting with Home_CSC). If you use Home_CSC your phone will not get formatted and data will remain Intact
USERDATA Stays empty.
6. Now connect USB cable to your laptop (Only laptop and not the phone)>> Turn off your phone >> Press volume up and volume down keep them pressed and plug in the USB type C into your phone.
7. You should be in download mode now, press volume up. In Odin you will see that phone is added.
8. Press start in Odin. Wait for it to finish and let the phone restart (it will happen On its own).
9. Done
Click to expand...
Click to collapse
Thanks for the steps. Couple of Quick Questions:
1) I used frija to download the firmware (I typed CSC: TMB in frija, as its the first time I am using it, is it the right way)
2) I also checked the version in frija with the CSC: XAA, the version is same. How can I make sure that I have downloaded the correct TMB firmware.
Thanks.

dawinner said:
Thanks for the steps. Couple of Quick Questions:
1) I used frija to download the firmware (I typed CSC: TMB in frija, as its the first time I am using it, is it the right way)
2) I also checked the version in frija with the CSC: XAA, the version is same. How can I make sure that I have downloaded the correct TMB firmware.
Thanks.
Click to expand...
Click to collapse
You might want to extract the files and check for differences. The Frija tool has been kind of good to me.

Mbetu said:
You might want to extract the files and check for differences. The Frija tool has been kind of good to me.
Click to expand...
Click to collapse
Thanks for all the help, one last question, and I dont know if you will know about this:
To enable ESIM (Only T-Mobile version has E-SIM), do I need to flash U version of T-Mobile of U1 version of T-Mobile will also provide me with the same ESIM functionality?

dawinner said:
Thanks for all the help, one last question, and I dont know if you will know about this:
To enable ESIM (Only T-Mobile version has E-SIM), do I need to flash U version of T-Mobile of U1 version of T-Mobile will also provide me with the same ESIM functionality?
Click to expand...
Click to collapse
I think I flashed the U version of Tmobile but it does not hurt to try both. This is what my device info says after converting my Xfiniti to Tmobile

Mbetu said:
I think I flashed the U version of Tmobile but it does not hurt to try both. This is what my device info says after converting my Xfiniti to Tmobile
Click to expand...
Click to collapse
Thanks!!!!

Mbetu said:
I think I flashed the U version of Tmobile but it does not hurt to try both. This is what my device info says after converting my Xfiniti to Tmobile
Click to expand...
Click to collapse
I flashed the complete U firmware except the USER DATA file. But my Service Provider Software version is still stuck at XAA, its not changing to TMB. Though the phone model has changed to what you have in your screenshot.
Any idea what to do?

dawinner said:
I flashed the complete U firmware except the USER DATA file. But my Service Provider Software version is still stuck at XAA, its not changing to TMB. Though the phone model has changed to what you have in your screenshot.
Any idea what to do?
Click to expand...
Click to collapse
So the Model is 986U/DS ? And is eSim enabled ?. That is the state you would want to be in. I understand the last XXX in the service provider software can't be changed. Mine didn't change and stayed CCT which is for xfinity but the as you can see, I have TMB/TMB, TMB/CCT. Esim is enabled and my Mint mobile (Tmobile) number is on it and I have a foreign physical Sim which is roaming on AT&T on the physical slot.
You might be close.

Mbetu said:
So the Model is 986U/DS ? And is eSim enabled ?. That is the state you would want to be in. I understand the last XXX in the service provider software can't be changed. Mine didn't change and stayed CCT which is for xfinity but the as you can see, I have TMB/TMB, TMB/CCT. Esim is enabled and my Mint mobile (Tmobile) number is on it and I have a foreign physical Sim which is roaming on AT&T on the physical slot.
You might be close.
Click to expand...
Click to collapse
Also picked this nugget up from another thread
"You have to flash full tmb firmware. Not xaa tmb but 986u tmb firmware. The esim is in the user data section you'll flash"
Others have suggested you have to do a factory reset or flash the actual CSC file not the Home CSC which means you will loose DATA. I was doing this on a phone I had not setup yet so didn't mind loosing DATA. I am also assuming you have a TMB sim card in the phone because I understand that is needed so the phone can connect to Tmobile and download the carrier data files that actually changes the CSC after a clean flash.
These are just some of the things I picked up from here when doing my conversion.

Mbetu said:
Also picked this nugget up from another thread
"You have to flash full tmb firmware. Not xaa tmb but 986u tmb firmware. The esim is in the user data section you'll flash"
Others have suggested you have to do a factory reset or flash the actual CSC file not the Home CSC which means you will loose DATA. I was doing this on a phone I had not setup yet so didn't mind loosing DATA. I am also assuming you have a TMB sim card in the phone because I understand that is needed so the phone can connect to Tmobile and download the carrier data files that actually changes the CSC after a clean flash.
These are just some of the things I picked up from here when doing my conversion.
Click to expand...
Click to collapse
Yup I used the TMB version only. The model Number changed to 986U/DS. In About phone, it shows me the IMEI of the Esim, but its greyed out.
The only thing I dont have is the T-Mobile Sim. I think thats whats causing the issue. I will arrange a t-Mobile sim and try it tomorrow.
Thanks for all the help.

Mbetu said:
Also picked this nugget up from another thread
"You have to flash full tmb firmware. Not xaa tmb but 986u tmb firmware. The esim is in the user data section you'll flash"
Others have suggested you have to do a factory reset or flash the actual CSC file not the Home CSC which means you will loose DATA. I was doing this on a phone I had not setup yet so didn't mind loosing DATA. I am also assuming you have a TMB sim card in the phone because I understand that is needed so the phone can connect to Tmobile and download the carrier data files that actually changes the CSC after a clean flash.
These are just some of the things I picked up from here when doing my conversion.
Click to expand...
Click to collapse
QQ: Does it has to be a T-Mobile Sim? or Mint mobile or anyother T-Mobile based MVNO should work?

dawinner said:
QQ: Does it has to be a T-Mobile Sim? or Mint mobile or anyother T-Mobile based MVNO should work?
Click to expand...
Click to collapse
Has to be a Tmobile Sim. I tried a Mint Sim it didn't work. If you are seeing the esim but greyed out, then you are close. Restart with a Tmobile Sim and you might be in business

Mbetu said:
Has to be a Tmobile Sim. I tried a Mint Sim it didn't work. If you are seeing the esim but greyed out, then you are close. Restart with a Tmobile Sim and you might be in business
Click to expand...
Click to collapse
Thanks that helps. I just have to figure a way to get a tmobile sim. I dont have it. Lol. Will try again once I get my hands on a Tmobile sim.
Thanks for the help.

dawinner said:
Thanks that helps. I just have to figure a way to get a tmobile sim. I dont have it. Lol. Will try again once I get my hands on a Tmobile sim.
Thanks for the help.
Click to expand...
Click to collapse
Anytime. FYI, dois not have to be an active TMB sim. Used ones are on ebay for about 2 bucks.

Mbetu said:
Anytime. FYI, dois not have to be an active TMB sim. Used ones are on ebay for about 2 bucks.
Click to expand...
Click to collapse
Thanks. Let me try those.

Since the OP looks like problem solved, and not wanting to waste new thread, i have similar issues, can you help?
I have an S10e I recently broke (amazon renewed w/U1 FW), so I got another S10e from amazon, renewed which appears to also be U1 FW.
Except the latest, the replacement phone, the one I have now, NOONE can hear me, like all the time!!!!!!! Dead spots everywhere! Its so annoying. Its like i have a bad Mic? Or something...
This didn't happen with my identical phone, the one I had prior to this one, using identical sim.
I'm on Mint mobile, which is a TMO MVNO and currently have XAA/XAG FW running on the new S10e, the new one w/bad Mic or FW problem
It appears I am on U1 Unlocked USA firmware on latest phone ( i may have flashed FW Odin when I got this new one-to be safe- i forgot)
ALSO: BOTH renewed S10e's I've Purchased from Amazon, when lookup the IMEI, it shows as the AT&T Model. Which i understand the U/U1 FW can be swapped, BUT, both phones were advertised as U1 Models for the Hardware, so they sold me U models but they flashed with U1 FW probably to make more money. (this may seem trivial, but Samsung specifically has stated TWICE, that I couldn't Beta Test their last to major android FW's, because my phone shows as At&t on their end, and not the truly unlocked U1 model, for which the beta tests were for. And i was told when i purchased it was fully unlocked U1 ver. The phone itself even says its 970u1 in settings etc.)
Are there ANY hardware (including frequency bands) differences between U and U1 Models???
Is it somehow possible that my CSC, or FW on my phone is affecting my phone so badly that people cant hear me like 88% of all calls? Like should i flash different FW, or reflash or use different CSC??
Is it possible that if I went with a locked TMO FW (or another) that I could possibly, maybe get better reception so folks can hear me better? Or hear me more often or more frequently?
How often do mics go bad or get dirty on these? Can a mic be cleaned?

I have been in the other Note 20 flashing thread but I am stuck. Tried so many ways but can't get the TMB csc to stick, always shows only XAA. I have TMO sim card too. Not sure if they blocked it on the newer releases of the phone
Has anyone tried Samkey to do this? Heard it only takes 1 credit but smallest amount of credits to purchase on ebay is 10 and I dont feel like investing more money into this effort