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H990DS(TWN) - Upgrade/Refurbish to other Regional ROM version

Good day to all.
I recently bought a V20, a Taiwan version H990DS, so with a TWN ROM. The latest TWN ROM is from last year. Is it possible to flash to the newer Singapore ROM? (SEA)
Like this one : H990ds10e_00_OPEN_SG_DS_OP_0314.kdz (10 april 2017)
I now have :
BASEBAND : MPSS.TH.2.0.1.c3-00027-M8996FAAAANAZM-1.77269.3.79643.3
KERNEL : 3.18.31
BUILD NUMBER : NRD90M
SOFTWARE VERSION : V10c-TWN-XX
MODEL NUMBER : LG-H990ds
I have experience with flasing rom's, but only at Samsung devices. LG is new for me. But I have read the threads around here how to flash a new ROM.
I hope somebody can give me a answer to my question. Thanks in advance!
Greetings from The Netherlands

Hello
someone actually managed to do it, so it seems doable, and fairly easy I'd say.
I was tempted to do it myself, and still am, but then I was just hoping LG would come around with a new update to avoid me all this nuisance...
---------- Post added at 11:10 AM ---------- Previous post was at 11:10 AM ----------
https://forum.xda-developers.com/v20/help/lg-v20-h990ds-upgrade-t3586986/page2

buongu said:
Hello
someone actually managed to do it, so it seems doable, and fairly easy I'd say.
I was tempted to do it myself, and still am, but then I was just hoping LG would come around with a new update to avoid me all this nuisance...
---------- Post added at 11:10 AM ---------- Previous post was at 11:10 AM ----------
https://forum.xda-developers.com/v20/help/lg-v20-h990ds-upgrade-t3586986/page2
Click to expand...
Click to collapse
Hi @buongu
It is just one person who switched his ROM, (@Mattfly93)
On Samsung devices, like the S7, it was a piece of cake switching ROM with ODIN. The risk was very minimal.
I wonder how high the risk is switching ROM with the LG V20 H990DS using LGUP.

there were others too, a guy here (https://forum.xda-developers.com/v20/help/australian-f-h990ds-t3551066) tried out different ROMs to find better suiting apn settings; other guys too, actually a lot of people with the H990DS seems to be into this subject

buongu said:
there were others too, a guy here (https://forum.xda-developers.com/v20/help/australian-f-h990ds-t3551066) tried out different ROMs to find better suiting apn settings; other guys too, actually a lot of people with the H990DS seems to be into this subject
Click to expand...
Click to collapse
I see, thanks for the link. I read that topic but must have overseen it
Are you going to change ROM version? And what is the reason to change it?
What are the differences between the Taiwan(TWN) and the newer Singapore(SEA) ROM?

Pierre118 said:
I see, thanks for the link. I read that topic but must have overseen it
Are you going to change ROM version? And what is the reason to change it?
What are the differences between the Taiwan(TWN) and the newer Singapore(SEA) ROM?
Click to expand...
Click to collapse
Yes I'm definitely considering a change. Mainly because they keep receiving updates, I don't know the details, but it seems like there have been a few improvements in the audio compartment as well (which is what I care most about), practically every version had them expect for the h990ds twn. SEA seems to be the one getting updates on a regular basis, so that's the one I'm looking at
there shouldn't be any real difference, same apps, same sw release, just a few fixes ahead so hopefully less glitches.

buongu said:
Yes I'm definitely considering a change. Mainly because they keep receiving updates, I don't know the details, but it seems like there have been a few improvements in the audio compartment as well (which is what I care most about), practically every version had them expect for the h990ds twn. SEA seems to be the one getting updates on a regular basis, so that's the one I'm looking at
there shouldn't be any real difference, same apps, same sw release, just a few fixes ahead so hopefully less glitches.
Click to expand...
Click to collapse
What is keeping you not doing it?

Pierre118 said:
What is keeping you not doing it?
Click to expand...
Click to collapse
I don't enjoy this kind of tweaking anymore
I used to, when updates were scarce and custom ROMs were pretty much the only way to prolong a smartphone's life... but nowadays companies promise a 2 year support for all their devices, so why do we still need to put up with boring and elaborate actions like this?
and there's a chance we won't see any future OTA either, judging from the info I have found it will still be recognized by your software as from TWN, but the update won't match any of the ones for TWN or the ones for SEA, so from that moment on manual updating is all you have... and THAT pisses me off

buongu said:
I don't enjoy this kind of tweaking anymore
I used to, when updates were scarce and custom ROMs were pretty much the only way to prolong a smartphone's life... but nowadays companies promise a 2 year support for all their devices, so why do we still need to put up with boring and elaborate actions like this?
and there's a chance we won't see any future OTA either, judging from the info I have found it will still be recognized by your software as from TWN, but the update won't match any of the ones for TWN or the ones for SEA, so from that moment on manual updating is all you have... and THAT pisses me off
Click to expand...
Click to collapse
I can understand your feelings about this and to be honest, I share them. I am not afraid of switching ROM from TWN to SEA, i think that will go without any problem. But after that it is manual updating, that is something I did not realised. I have to think about this, but the chance I will manually update is big. The updated software and, most important, the security updates can not be ignored. We will keep in touch. Thanks for your opinion.

I would like to know if I can safely use the 'Refurbish' option in the LGUP tool for changing my TWN(Taiwan) Rom to SEA(Singapore) Rom?
Or do I have to use the 'Upgrade' option?

I am currently on the India ROM, which was last updated in January. Also seriously thinking of switching to the SEA ROM. My only concern is if VoLTE will work on it -- currently, I use a Jio 4G SIM. Does anyone know if SEA will support it?
I also have a S7 Edge, and when I changed ROMs on it (from India to UK ROM), VoLTE stopped working. I had to flash back the INS ROM to get it to work again. Does the same happen with LG ROMs? That is, are regional variants of LG ROMs unique?

krumbs said:
I am currently on the India ROM, which was last updated in January. Also seriously thinking of switching to the SEA ROM. My only concern is if VoLTE will work on it -- currently, I use a Jio 4G SIM. Does anyone know if SEA will support it?
I also have a S7 Edge, and when I changed ROMs on it (from India to UK ROM), VoLTE stopped working. I had to flash back the INS ROM to get it to work again. Does the same happen with LG ROMs? That is, are regional variants of LG ROMs unique?
Click to expand...
Click to collapse
I can only answer your first question: yes, the SEA firmware fully supports VoLTE

im also thinking about doing this. im on v10e ESA, securiry patch is December. where can i get the DLL for H990ds for LGUP?

dyepnoodle said:
im also thinking about doing this. im on v10e ESA, securiry patch is December. where can i get the DLL for H990ds for LGUP?
Click to expand...
Click to collapse
All you need is in the 1st post of this thread. Good luck and let us know.
https://forum.xda-developers.com/v20/how-to/v20-kdz-restore-failing-9-completing-fix-t3546817

I took the plunge and it did not go off well! A few observations.
1] I was trying to switch from INS to SEA. Refurbish option did not work -- throws up errors when installation reaches 4 per cent.
2] Upgrade option went off without errors but I ended up with cust id mismatch error after reboot. I think Upgrade leaves a few files behind that are related to firmware region. However, you can dismiss these warnings and use the phone. I also ended up with device failed to decrypt error, but that was sorted with a factory reset.
3] VoLTE (from Jio in India) does not work on the SEA firmware.
4] The SEA firmware felt smoother and more responsive than INS one from January. I also see a few SG specific apps.
5] Have now restored back to the INS firmware by downloading the appropriate KDZ file.
6] Now hoping LG wakes up soon and ports the SEA update to other regions!
Thankfully, the LGUP tool is pretty reliable, and if you are used to ODIN, you will be at home here. I would suggest you go ahead and check it out. Maybe it will work for your region...

I just did the same from TWN to SEA, and surprisingly VoLTE is there!
I see it in the shortcuts, I have no use for it because neither of my carriers support it, but it's there

krumbs said:
3] VoLTE (from Jio in India) does not work on the SEA firmware.
Click to expand...
Click to collapse
just in case you needed the info, this is a screenshot from the latest SEA firmware

update is comming is comming guys, check here http://devtester.ro/projects/lg-firmwares/#imei

buongu said:
just in case you needed the info, this is a screenshot from the latest SEA firmware
Click to expand...
Click to collapse
That's interesting. I did not have this option on SEA. I guess it is carrier specific. From my experience with Samsung S7 Edge, relevant carrier strings had to be present in the CSC file/ folder for VoLTE to work.
If root was available for our device, then perhaps this issue can be fixed.
---------- Post added at 12:09 PM ---------- Previous post was at 11:58 AM ----------
dyepnoodle said:
update is comming is comming guys, check here http://devtester.ro/projects/lg-firmwares/#imei
Click to expand...
Click to collapse
For India, the latest update listed on that site is from April 1. But I don't see it in the downloads section. Does it take over a month for the firmware to be actually available?!

Does any of these dual sim firmware enable band 66?

Is there a reliable way to root my S7 Edge SM-G935A?

I'm not very tech savvy, but rooting this model (S7 Edge SM-935A) seems to be hard according to what I have found. I would like to root it and get rid of all the bloatware and try a custom ROM, but don't want to mess things up. Can anyone point me in the right direction? Thanks very much for any info.

I have an AT&T S7 Edge and wanted to get rid of the bloatware also. I installed this ROM and all is working great. I didn't root device but I have no bloatware. It also get's OTA updates quick.
Samsung SM-935U firmware install guide on SM-935A device
Hope this helps....

skua123 said:
I'm not very tech savvy, but rooting this model (S7 Edge SM-935A) seems to be hard according to what I have found. I would like to root it and get rid of all the bloatware and try a custom ROM, but don't want to mess things up. Can anyone point me in the right direction? Thanks very much for any info.
Click to expand...
Click to collapse
Not really difficult. Need a special version of odin, modded by someone who goes by the alias Prince Comey. Then must rught click on the exe file in winblowz and select 'run as administrator'.
The non-modded versions will error out and won't complete the flashing process. Must be careful, and be sure that you are are flashing the correct files for your particular phone. I rooted my AT&T S7 Edge by flashing just one file.
The trickiest part is finding the files for your variant, whether it's AT&T, Verizon, or other. Also must install the usb driver for Samsung and the adb driver, both on your windows computer.
Sent from my LG-D851 using XDA-Developers Legacy app

Text Message Recovery on S7 Edge (AT&T)
I have an AT&T Samsung S7 Edge (smg935a). I think I need to root mine so I can undelete my text messages. If I am headed in the right direction, can you provide links to the special Odin version and file you flashed?

I'm in the same boat and I think this is the link that leads to the Odin you want.
https://forum.xda-developers.com/android/software/patched-odin-3-13-1-t3762572

OK I've read thru tons of old how to's .
I have a SM-G935A WITH android 8.0.0 ,Samsung experience version :9.0 baseband :g935auc4cre4 ,kernel : 3.18.71.13527040
I want root to remove bloatware from this device , How to do this ? Thanks

memturbo said:
OK I've read thru tons of old how to's .
I have a SM-G935A WITH android 8.0.0 ,Samsung experience version :9.0 baseband :g935auc4cre4 ,kernel : 3.18.71.13527040
I want root to remove bloatware from this device , How to do this ? Thanks
Click to expand...
Click to collapse
There is no engineering bootloader available for Oreo yet, so you will have to drop back to Nougat. From there, you can either go with AT&T firmware or the Unlocked firmware, depending on how badly you want WiFi calling and VoLTE. (If you aren't an AT&T customer, this is a really easy call).
Just going with the U firmware will remove the vast majority of the bloat right out of the box. You can root it and get the rest, but I haven't found it to be worth the effort, as the U firmware is pretty good as it is.

Good afternoon, I need your help to install TWRP and be ROOT in my samsung galaxy s7 edge model SM-G935A version AT and T with OREO ANDROID and processor QUALCOMM (hero2qlteuc) (G935AUCS4CRG5), there are tutorials on YOUTUBE for other models, but when you apply them in this model you stay blocked the ODIN when trying to install the TWRP, I can help you, if you know something you can write to me whatsapp +57 3004386706 Jorge Gonzalez
Thank you

jorge.gonzalez said:
Good afternoon, I need your help to install TWRP and be ROOT in my samsung galaxy s7 edge model SM-G935A version AT and T with OREO ANDROID and processor QUALCOMM (hero2qlteuc) (G935AUCS4CRG5), there are tutorials on YOUTUBE for other models, but when you apply them in this model you stay blocked the ODIN when trying to install the TWRP, I can help you, if you know something you can write to me whatsapp +57 3004386706 Jorge Gonzalez
Thank you
Click to expand...
Click to collapse
Samsung S7 edge and S7 flat variants do not allow TWRP to remain installed upon rebooting. There are ways to still root with it however. I found a post on X.D.A. that states SM-G935A ( AT&T variant of the 7s Edge ) runs fine after flashing the SM-G935U firmware. I had flashed it without issues myself, however I never tested it before running across the comboRom that I was originally looking for. Just place all 5 files in the correct positions ( BL,AP,CP,CSC,USER) of Odin. If Odin is only allowing you to 4 spots to flash. You need to use a different version of Odin. I used the "patched" version of Odin. Unsure if that is one and the same as the prince version.
S7 Edge while 'rooted' at least by the way I had rooted them. Runs very very HOT and lags to the point of annoyance.
So if you 'think' you need to root your phone. Make sure you need to first and fore most because was a back and forth headache to root. make changes, then unroot. then test. then root again. then test agian, then unroot.. etc.
https://forum.xda-developers.com/verizon-s7-edge/development/easyroot-unroot-t3859762
that link is for bootloader V4 to root.
When flashing SU make sure you use the system version and not the system-less version if you follow the instructions for OREO (Android version 8 ). The instructions I originally followed never stated that aspect and I had gone in circles for an hour until i discovered the problem.
Verizon variant had a few different ways to root/un-root, with different walk-thrus of which I 'think' would work with different carriers. Just instead of using the S935V firmware, You would just need to use your carriers firmware while flashing it with Odin but I could be wrong so please double check the comments of whichever way you choose to root your phone for someone else with similar question/concerns as yours.
If you had been using your phone after the messages were deleted ( especially if its been awhile since you deleted them ) then you are likely S.O.L. However if it's worth the time spent for you to try, then it's worth the effort to try.

SofaSpud said:
Not really difficult. Need a special version of odin, modded by someone who goes by the alias Prince Comey. Then must rught click on the exe file in winblowz and select 'run as administrator'.
The non-modded versions will error out and won't complete the flashing process. Must be careful, and be sure that you are are flashing the correct files for your particular phone. I rooted my AT&T S7 Edge by flashing just one file.
The trickiest part is finding the files for your variant, whether it's AT&T, Verizon, or other. Also must install the usb driver for Samsung and the adb driver, both on your windows computer.
Click to expand...
Click to collapse
I have also a s7 edge at&t(SM G935A ,where can i find the whrite files To avoid error....
Thank you.......
Sent from my Samsung SAMSUNG-SM-G935A using XDA Labs

Declanick said:
Samsung S7 edge and S7 flat variants do not allow TWRP to remain installed upon rebooting. There are ways to still root with it however. I found a post on X.D.A. that states SM-G935A ( AT&T variant of the 7s Edge ) runs fine after flashing the SM-G935U firmware. I had flashed it without issues myself, however I never tested it before running across the comboRom that I was originally looking for. Just place all 5 files in the correct positions ( BL,AP,CP,CSC,USER) of Odin. If Odin is only allowing you to 4 spots to flash. You need to use a different version of Odin. I used the "patched" version of Odin. Unsure if that is one and the same as the prince version.
S7 Edge while 'rooted' at least by the way I had rooted them. Runs very very HOT and lags to the point of annoyance.
So if you 'think' you need to root your phone. Make sure you need to first and fore most because was a back and forth headache to root. make changes, then unroot. then test. then root again. then test agian, then unroot.. etc.
https://forum.xda-developers.com/verizon-s7-edge/development/easyroot-unroot-t3859762
that link is for bootloader V4 to root.
When flashing SU make sure you use the system version and not the system-less version if you follow the instructions for OREO (Android version 8 ). The instructions I originally followed never stated that aspect and I had gone in circles for an hour until i discovered the problem.
Verizon variant had a few different ways to root/un-root, with different walk-thrus of which I 'think' would work with different carriers. Just instead of using the S935V firmware, You would just need to use your carriers firmware while flashing it with Odin but I could be wrong so please double check the comments of whichever way you choose to root your phone for someone else with similar question/concerns as yours.
If you had been using your phone after the messages were deleted ( especially if its been awhile since you deleted them ) then you are likely S.O.L. However if it's worth the time spent for you to try, then it's worth the effort to try.
Click to expand...
Click to collapse
Will someone, anyone help me figure out how to root my galaxy s7 its through at&t? When i say i have no idea how, i mean it, and ive bricked a phone last time i tried so id really appreciate some help
---------- Post added at 09:16 AM ---------- Previous post was at 08:59 AM ----------
Will someone, anyone help me figure out how to root my galaxy s7 its through at&t? When i say i have no idea how, i mean it, and ive bricked a phone last time i tried so id really appreciate some help!
Reply on here or text me 7406883229

itstanner740 said:
Will someone, anyone help me figure out how to root my galaxy s7 its through at&t? When i say i have no idea how, i mean it, and ive bricked a phone last time i tried so id really appreciate some help
---------- Post added at 09:16 AM ---------- Previous post was at 08:59 AM ----------
Will someone, anyone help me figure out how to root my galaxy s7 its through at&t? When i say i have no idea how, i mean it, and ive bricked a phone last time i tried so id really appreciate some help!
Reply on here or text me 7406883229
Click to expand...
Click to collapse
This thread is only 1 page long with 10 previous posts before yours. Out of those 10 posts, 3-4 of them describes what you're seeking...
Guessing you saw the threads title and bcuz of that you clicked on it and asked your question. Did it ever dawn on you that your question is nearly identical to the title of this thread? This is how forums work, if a threads subject is similar to the subject that you're interested in then, the thread may contain your answer. Next, is where quite a few folks seem to really struggle, sort of like yourself but it's ok, everyone was new once. This is where you'd want to pay close attention, really concentrate and use every bit of brain power to focus on this next step. I'm going to reiterate, just in case I lost ya: You just located a thread that it's title is very similar to a question that you have (you did a good job searching & your instincts to click/open it are on point, well done). A threads title tells you that the discussion(s) inside there relate to that topic. Upon opening the thread, you'll see rectangles vertically aligned, when members add thoughts or ideas to the topic, they're separated by the rectangles. They're arranged in chronological order the top being the first, the most recent or latest entry being the bottom. And thats how forums like this one and many others work. Pretty simple idea, I think, yet its highly effective.
Now, with this knowledge, Im sure your already 10 steps ahead of me, but I'll mention anyway for anyone else. To fully utilize the resourceful contents here, as it contains vast amounts of invaluable info, one must simply READ and COMPREHEND info that pertains to the subject that brought you here. That means reading (& understanding what you just read), each one of the posts inside the threads. No really, it really is that simple! Unless your device is new, theres likely someone who already asked your question or someone already posted a set of instructions describing the task youre needing. You can test this theory with this same thread youve commented in.
Amazing isn't it? By now, you've probably already figured it out and concluded that posting your message which mirrors the first one here wasn't necessary, nor was including your phone number.. If it wasnt already obvious, you're the lone outcast whom shared their number on a public forum. Most of us here, refrain from such similar activity, since the forum has option to directly contact members via the internal private messaging system. Some highly value their privacy and anonymity. But I cant decide for you, obviously you're comfortable with it.

......
@Talysdaddy
So that was the most condescensing, egotistical, and just blatantly rude response I have ever seen given on this site.. I promise you, I have a very impressive ability to retain knowledge, but considering I was on this site in the first place due to the fact that I have never been interested in, or ever even attempted to mess with my phone before in any type of way, I am slightly uneducated on this PARTICULAR topic. However, that IS NOT because i lack the ability to learn, comprehend and/or retain information, understood?
It is due to the fact that I have never sat down and educated myself on it.. WHICH BY THE WAY, is WHY I'm on this site in the first place, you know that IS the entire PURPOSE of this site? ....
You see how that works? .. Let me break it down for you! Pay close attention and try to follow me and actually comprehend what I am saying! (if you're able to, that is). ANYWAYS, as I was saying, I CAME TO THIS SITE TO TRY TO EDUCATE MYSELF on something I NEEDED to educated on! ALSO to be able to interact with other people, and ask those people questions! To be able to recieve responses from those people, in order to obtain the information THAT I CAME HERE FOR! WHICH BY THE WAY, IS EXACTLY WHAT THIS SITE IS SUPPOSED TO BE USED FOR! Hopefully I have yet to lose you, because this is the most important part! Let's try to read this next part, and actually try and COMPREHEND and UNDERSTAND what I'm saying. I CAME HERE TO USE THIS WEBSITE IN THE EXACT WAY THAT IT IS MEANT TO BE USED! .. To be able to share information! To exchange information! And to obtain information that I am not privy to or an expert on prior to visiting the site!! .. If I was educated on these things I WOULD NOT BE HERE!! Obviously! Soooooo, instead of being an arrogant and cocky JERK, do EVERYONE on this site a huge FAVOR, and next time NOT leave such a RUDE, SMART COMMENT!! Thanks!
P.S. isn't it funny how just from that comment, I could tell you exactly what you look like, the life you live, how insecure you are in yourself, and how you deal with that by trying to belittle others, in an attempt to make yourself feel superior.. BUT, and yes, there is a BUT!! Just because you might know more about this topic than myself, absolutely does not make you ANY more intelligent than myself.. Because I promise, anybody who leaves the response that you left, when I am using the site for its specific purpose in the first place, welllll... let's just say anyone who would do that, and who would do it to boost their superiority complex as a defense to their pathetic insecurities, well, let's just say I would bet my life on the fact that my IQ would make yours look SORT OF like you TRIED to make me look and feel when you left that comment
That's all, hope you find something better to do with your time than this in the future.. it is kind of sad! If you're not here to help, then don't comment! That goes for everyone's posts! Jerk.

Help please, I flashed rom and ruined phone

Sorry, but I am a newbie so forgive me if this is stupid!
1 I had a slight battery problem so decided (why??) to flash the rom on my unlocked S7 edge. I used the 'BTU' version.
2 after flashing rom i cannot make or receive voice calls
3 i went into a samsung store they said it was an unlocked SM-G935F and had 'XEU' firmware.
4 they kindly reflashed this for me but it didn't solve the problem
5 I have just tried downloading and reflashing again with the XEU firmware. But I still cannot make or receive calls
one weird thing is that the odd text seems to get through to me
Anyone got any ideas on how to unbrick my phone? Very much appreciated.
Sorry, one extra piece of information. I am on '3'. But if I put an O2 sim in the phone it can make and receive calls. But before my first flashing it worked fine with '3'.
It seems I must have flashed the wrong firmware but have no idea what was on there. The previous owner used a EE sim in it. But it was bought not locked to a network - i think. There was no network branding on the phone.

bobbaker1970 said:
Sorry, but I am a newbie so forgive me if this is stupid!
1 I had a slight battery problem so decided (why??) to flash the rom on my unlocked S7 edge. I used the 'BTU' version.
2 after flashing rom i cannot make or receive voice calls
3 i went into a samsung store they said it was an unlocked SM-G935F and had 'XEU' firmware.
4 they kindly reflashed this for me but it didn't solve the problem
5 I have just tried downloading and reflashing again with the XEU firmware. But I still cannot make or receive calls
one weird thing is that the odd text seems to get through to me
Anyone got any ideas on how to unbrick my phone? Very much appreciated.
Sorry, one extra piece of information. I am on '3'. But if I put an O2 sim in the phone it can make and receive calls. But before my first flashing it worked fine with '3'.
It seems I must have flashed the wrong firmware but have no idea what was on there. The previous owner used a EE sim in it. But it was bought not locked to a network - i think. There was no network branding on the phone.
Click to expand...
Click to collapse
Hey, can it boot? If yes then flash a custom rom. Some custom roms have multi csc options. Make sure to enable oem unlock before doing anything and flash modded twrp and take full backup
Sent from my Galaxy S7 Edge using XDA Labs

gupt07ash said:
Hey, can it boot? If yes then flash a custom rom. Some custom roms have multi csc options. Make sure to enable oem unlock before doing anything and flash modded twrp and take full backup
Sent from my Galaxy S7 Edge using XDA Labs
Click to expand...
Click to collapse
Yes it boots and works ok with an O2 sim but not with my '3' sim. Everything else works fine.
Thanks for your reply. But I don't want to use a custom rom. I want to get my stock rom working.
Does anyone know of a solution to this problem please?
Would it be possible to flash the wrong CSC - for example and American CSC - I am in Europe and on European CSC?
Many thanks
Bob

bobbaker1970 said:
Yes it boots and works ok with an O2 sim but not with my '3' sim. Everything else works fine.
Thanks for your reply. But I don't want to use a custom rom. I want to get my stock rom working.
Does anyone know of a solution to this problem please?
Would it be possible to flash the wrong CSC - for example and American CSC - I am in Europe and on European CSC?
Many thanks
Bob
Click to expand...
Click to collapse
Take a look at my thread.
https://forum.xda-developers.com/s7-edge/how-to/g935fd-twrp-backup-t3917485
Sent from my Galaxy S7 Edge using XDA Labs
---------- Post added at 05:06 PM ---------- Previous post was at 05:05 PM ----------
Yes you can install multi csc via root explorer.
Sent from my Galaxy S7 Edge using XDA Labs

gupt07ash said:
Take a look at my thread.
https://forum.xda-developers.com/s7-edge/how-to/g935fd-twrp-backup-t3917485
Sent from my Galaxy S7 Edge using XDA Labs
---------- Post added at 05:06 PM ---------- Previous post was at 05:05 PM ----------
Yes you can install multi csc via root explorer.
Sent from my Galaxy S7 Edge using XDA Labs
Click to expand...
Click to collapse
I'm really not sure why you suggest everyone to install TWRP? People with less knowledge shoudn't know that flashing twrp will break the knox and they won't be able to use secure folder etc. Please put more information with such suggestions.

rroyy said:
I'm really not sure why you suggest everyone to install TWRP? People with less knowledge shoudn't know that flashing twrp will break the knox and they won't be able to use secure folder etc. Please put more information with such suggestions.
Click to expand...
Click to collapse
They're probably already tripping Knox if they're here and seeking help.
I'm replying coz nobody else did and it's merely a suggestion.
Twrp can save a bricked device and it's important to make backups before experimenting. They're not kids ffs
Sent from my Galaxy S7 Edge using XDA Labs
---------- Post added at 05:53 PM ---------- Previous post was at 05:51 PM ----------
Since this guy quoted me, he'll provide you whatever csc you need
Goodbye
Sent from my Galaxy S7 Edge using XDA Labs

gupt07ash said:
They're probably already tripping Knox if they're here and seeking help.
I'm replying coz nobody else did and it's merely a suggestion.
Twrp can save a bricked device and it's important to make backups before experimenting. They're not kids ffs
Sent from my Galaxy S7 Edge using XDA Labs
---------- Post added at 05:53 PM ---------- Previous post was at 05:51 PM ----------
Since this guy quoted me, he'll provide you whatever csc you need
Goodbye
Sent from my Galaxy S7 Edge using XDA Labs
Click to expand...
Click to collapse
I still believe you've to warn them.
---------- Post added at 19:56 ---------- Previous post was at 19:54 ----------
bobbaker1970 said:
Sorry, but I am a newbie so forgive me if this is stupid!
1 I had a slight battery problem so decided (why??) to flash the rom on my unlocked S7 edge. I used the 'BTU' version.
2 after flashing rom i cannot make or receive voice calls
3 i went into a samsung store they said it was an unlocked SM-G935F and had 'XEU' firmware.
4 they kindly reflashed this for me but it didn't solve the problem
5 I have just tried downloading and reflashing again with the XEU firmware. But I still cannot make or receive calls
one weird thing is that the odd text seems to get through to me
Anyone got any ideas on how to unbrick my phone? Very much appreciated.
Sorry, one extra piece of information. I am on '3'. But if I put an O2 sim in the phone it can make and receive calls. But before my first flashing it worked fine with '3'.
It seems I must have flashed the wrong firmware but have no idea what was on there. The previous owner used a EE sim in it. But it was bought not locked to a network - i think. There was no network branding on the phone.
Click to expand...
Click to collapse
Try flashing XEU rom via odin but use CSC file instead of Home CSC you'll loose your data so don't forget to take a backup via Smart Switch.
one more suggestion flash older firmware (again 8.0) from XEU later connect your device to pc and update to latest via smart switch.

rroyy said:
I still believe you've to warn them.
---------- Post added at 19:56 ---------- Previous post was at 19:54 ----------
Try flashing XEU rom via odin but use CSC file instead of Home CSC you'll loose your data so don't forget to take a backup via Smart Switch.
one more suggestion flash older firmware (again 8.0) from XEU later connect your device to pc and update to latest via smart switch.
Click to expand...
Click to collapse
Many thanks that sounds like an interesting idea.
But.............. if I go back to the first version of 8.0 (oreo) will it wreck Knox or anything else to do with security. I want to still be able to use samsung pay for example.
Also, i was told by a samsung shop person that you can't downgrade because there are systems in place to stop you. Though i dont know if he meant from 8 to 7 or from recent 8 to older 8.
I am planning to flash this:
https://www.sammobile.com/firmwares/galaxy-s7-edge/SM-G935F/XEU/download/G935FXXU2EREM/222561/
due to fact that its original software was xeu. Is that ok?
Your help was very valuable thank you
Bob

bobbaker1970 said:
Many thanks that sounds like an interesting idea.
But.............. if I go back to the first version of 8.0 (oreo) will it wreck Knox or anything else to do with security. I want to still be able to use samsung pay for example.
Also, i was told by a samsung shop person that you can't downgrade because there are systems in place to stop you. Though i dont know if he meant from 8 to 7 or from recent 8 to older 8.
I am planning to flash this:
https://www.sammobile.com/firmwares/galaxy-s7-edge/SM-G935F/XEU/download/G935FXXU2EREM/222561/
due to fact that its original software was xeu. Is that ok?
Your help was very valuable thank you
Bob
Click to expand...
Click to collapse
you wont break the knox and you don't have to go that much back just download 2 version back from january or february will be enough.
you can't downgrade your bootloader or turn back to android 7.0 that's what they mean. Smart Switch shpuld fix the problem for you.

rroyy said:
you wont break the knox and you don't have to go that much back just download 2 version back from january or february will be enough.
you can't downgrade your bootloader or turn back to android 7.0 that's what they mean. Smart Switch shpuld fix the problem for you.
Click to expand...
Click to collapse
Many many thanks again Rroyy
Forgive me but I am new to this.
So are you saying:
1. Download:
https://www.sammobile.com/firmwares/galaxy-s7-edge/SM-G935F/XEU/download/G935FXXS3ERLF/251612/
That's the last but one from January 19.
Which has: PDA G935FXXS3ERLF
CSC G935FXEU3ERKF
2. Can I just flash that. Or must I remove the bootloader from that package and put in the current bootloader?
And I was presuming I would do all of that with Odin??? Am I wrong. Is there a way of doing it with smartswitch? (I have reset the phone and got rid of all of my information already)
update: tried flashing last rom , that didnt work. the one before wouldn't flash - i notice it has numbers'3' in the various codes rather than 4.
still not solved
Many thanks again
Bob

bobbaker1970 said:
Many many thanks again Rroyy
Forgive me but I am new to this.
So are you saying:
1. Download:
https://www.sammobile.com/firmwares/galaxy-s7-edge/SM-G935F/XEU/download/G935FXXS3ERLF/251612/
That's the last but one from January 19.
Which has: PDA G935FXXS3ERLF
CSC G935FXEU3ERKF
2. Can I just flash that. Or must I remove the bootloader from that package and put in the current bootloader?
And I was presuming I would do all of that with Odin??? Am I wrong. Is there a way of doing it with smartswitch? (I have reset the phone and got rid of all of my information already)
Many thanks again
Bob
Click to expand...
Click to collapse
Flash the os via odin (select CSC file not home CSC) Untick re-partition option on odin. (Instructions)
Select all files except home_CSC from odin. BL-CP-AP and CSC
After your device boots, skip settings till you see the home page. Connect your device to pc and launch smartswitch (It could ask you to install smart switch to your device) and update latest firmware over smart switch.

rroyy said:
Flash the os via odin (select CSC file not home CSC) Untick re-partition option on odin. (Instructions)
Select all files except home_CSC from odin. BL-CP-AP and CSC
After your device boots, skip settings till you see the home page. Connect your device to pc and launch smartswitch (It could ask you to install smart switch to your device) and update latest firmware over smart switch.
Click to expand...
Click to collapse
Many thanks again Rroyy
Unforunately, I am getting nowhere. And cannot get my phone to work.
Odin will not let me flash any files which have '3' rather than 4 in them. For example I can flash
BL_G935FXXS4ESC1_CL14843133_QB22373776_REV00_user_low_ship.tar.md5
Because it is FXXS4.... the '4' being the important bit
But I cannot flash:
BL_G935FXXU3ERL3_CL14843133_QB20951136_REV00_user_low_ship.tar.md5
because it is FXXU3.... the '3' being the important bit
This seems to reduce me down to the last firmware for both XEU and BTU neither of which enable me to make calls on '3' network like I have done for months before flashing.
Thanks for all of your kind help
It looks like my phone is bricked (
All the best
Bob

bobbaker1970 said:
Many thanks again Rroyy
Unforunately, I am getting nowhere. And cannot get my phone to work.
Odin will not let me flash any files which have '3' rather than 4 in them. For example I can flash
BL_G935FXXS4ESC1_CL14843133_QB22373776_REV00_user_low_ship.tar.md5
Because it is FXXS4.... the '4' being the important bit
But I cannot flash:
BL_G935FXXU3ERL3_CL14843133_QB20951136_REV00_user_low_ship.tar.md5
because it is FXXU3.... the '3' being the important bit
This seems to reduce me down to the last firmware for both XEU and BTU neither of which enable me to make calls on '3' network like I have done for months before flashing.
Thanks for all of your kind help
It looks like my phone is bricked (
All the best
Bob
Click to expand...
Click to collapse
Bob, can you flash latest XEU? We are going to get new security patch update in few weeks. April security patch not yet release. If you can flash latest XEU you can update your device to upcoming update via Smart Switch.

Still bricked: cannot make calls
Thanks for help everyone.
I thought I would give you my conclusions so far in case they are helpful to anyone.
1 My phone was working perfectly for SMS, phone calls and data on the '3' network.
2 Because the battery life didn't seem good I decided to flash it
3 It turns out my phone was initially sold with 'XEU' firmware. But I didn't know that and so I flashed it with 'BTU' firmware - the latest edition.
4 As a result the phone could not make or receive calls on the '3' network. But... it can make and receive calls on the 'O2' network. However, '3' is my contract network and so I want to stay with that. Also, I think the companies are running down 2G transmissions ?? so eventually I may have problems with O2 .
FYI it seems the problem may be that the phone is not sending or receiving certain frequencies as otherwise why would it work ok on O2 but not 3??
**********Tried to resolve by:
5 New sim card
6 Factory reset
7 Clear partition
8 Flashing, again. I tried:
a latest XEU
b latest BTU
c previous XEU
d previous BTU
e previous XEU but with the modem file from EE
f previous XEU but with the modem file from 3
g previous XEU again but then did an over the air update to current XEU
Non of them worked.
*****Conclusion
My phone still will not make or receive calls on the 3 network - it won't register on the network (yes I have tried resetting, selecting network etc etc). It sometimes works with text messages though?? And 4G sometimes works. Otherwise the phone works perfectly, just not for phone calls.
Again on the O2 network all seems to work and I can make and receive calls.
So, to for me, it is bricked in that I can't use it as a phone.
I find it completely inexplicable that I can't get it to work on 3 for calls. There doesn't seem any logic to it.
But thanks everyone for all of your kind help. If anyone has any more suggestions I am willing to try them. Especially if they know how to turn on the relevant frequencies on the phone.
Bit of info: Samsung kindly ran a test to check the reception and transmission of signals. But the test wouldn't even start because it couldn't test the first frequency (apparently it should test lots).

RRoyy
Many thanks again for your reply. You've been very kind with your time.
Yes I can flash the current XEU but it still doesn't work. And I flashed the previous XEU and then did an update using over the air from the phone. But still it doesn't work.
Very best wishes
Bob

Weird
I put an EE sim into my phone (the previous owner had bought it unlocked but used it with an EE contract).
Then I put my '3' sim into my phone. And............ I was able to make one!! call.
After that it stopped working.
That was on XEU where I had downloaded the previous version and let it update over the air.
Does this in any way help diagnose the problem??
Thanks again.

bobbaker1970 said:
RRoyy
Many thanks again for your reply. You've been very kind with your time.
Yes I can flash the current XEU but it still doesn't work. And I flashed the previous XEU and then did an update using over the air from the phone. But still it doesn't work.
Very best wishes
Bob
Click to expand...
Click to collapse
Flash that version and update via smart switch please not ota. I've XEU device and I flashed btu many times to my device never had any problem. Than I update my device to TUR to get updates released bu Turkish operators.
There must be something about installization process that's why I'm asking you to update your device over pc via Smart Switch.

Thank you again RRoyy
I shall do as you suggest.
I think you are saying:
1 Flash previous version of XEU???
2 Then update to current version of XEU using 'smart switch'
3 Should I flash with my '3' sim card in the phone. Or not?
Is that correct?
Also, a small point but I didn't know smartswitch could update firmware. I have never used it. But shall give it a try.
If you could please tell me if the above is correct before I do it I would be most grateful. And thank you again for your time.
Side note: Today I tried an EE sim. It does work, but only on 2G. Not on 3G or auto switch. So, it may be the case that the original flashing of BTU that I did first of all somehow made the phone only 2G? Is that possible?
++Update. Smartswitch spent ages trying to update but failed at the last bit. IT downloaded the software but failed on installation. I have no idea why.
Any suggestions??
Best wishes
Bob

Hello again. So I still haven't had any luck.
I flashed the BTU before the current version. But then the smartswitch wouldn't update it to the current version. It claimed it was already current. It wouldn't update over the air either.
I then flashed the XEU before the current version and I DID manage to get smartswitch to update it to the current version. But '3' sim still not working.
It seems that the problem revolves around certain frequencies that do/don't work on my phone. I suppose it could be a hardware issue though that is unlikely seeing as it happened immediately after I flashed the phone for the first time.
This gives rise to two quesions:
1 Does flashing the firmware get rid of EVERYTHING on the phone. Or does it leave residual bits of information that aren't overwritten?
2 Perhaps the problem is the 'CP' software which seems to be the same for all the options I can flash.
3 If I could flash with firmware from another country with a different CP file perhaps that might push the phone into action.
4 Is there a way to check what frequencies my phone can and cannot receive transmit. I don't mean the specifications. I mean the actual received/transmitted frequencies/bands.
Many thanks again.
Finally, apologies for posting this without logging in but there is a problem with trying to login to the forum on this Chromebook. The space for name and password is not visible. Works ok in windows 10 but not on my chromebook.
Best wishes
Bob

1) Yes I believe the efs of the phone is not wiped when flashing software. Everything else is wiped.
2) You could try another country rom. Just make sure the model number is the same. Changing the CP could work as CP is the modem file.

S8 plus ussd problems, call forwarding

Hi first post here but not a complete newbie. But this time I'm stuck big time and would appreciate some help.
I've got a s8 plus that recently started playing up. All of a sudden it started not being able to make or receive calls. But I noticed it only happened when the "conditional call forwarding active" message didn't appear when dialing. I figured it had something to do with call forwarding so try to change the settings on supplementary services settings but when I tried to enter the settings an error message appeared "failed to read data" I tried sending the code manually to cancel voice mail *#022# to see if it would work but I got "connection problem or invalid mmi code" so assumed it could be that the phone is trying to check with the network the forwarding settings as the call starts but for some reason it cannot communicate with it as the mmi codes don't seem to working?? (I'm not that knowledgeable in that area) I tried all the fixes online for the "connection problem or invalid mmi" but none work so I flashed the firmware through Odin even tried a few different ones, I've been playing around with Odin for a while so I'm comfortable with it, I even flashed a pit once for a note 4 that was bricked (just saying so you can see I'm comfortable with using it, not an expert just comfortable) but nothing has fixed my problem my phone is a g955fd running pie and one UI with the latest security update. I've read the duos have some issues with this. I've tried other sim cards on my phone from different carriers and the problem is the same and I'm using my sim on a borrowed phone and no problems. I'm assuming the problem goes deeper than the firmware, could this problem be boot loader related? Would a nand erase and reinstalling the boot loader fix it? Everything else works 100%
Someone please help me, the phone I'm borrowing is an apple and every day I have it I feel weaker and dumber, it's like kryptonite.
Sorry for the long post but I've been browsing xda forums for years and I know that you guys always say to share as much info as possible. By the way I've searched and couldn't find a thread about this but it there is one I promptly apologize and just ask for the link to it if not thanks in advanced.

? G935F or G935U exynos vs snapdragon
Way for snapdragon
Flash https://forum.xda-developers.com/galaxy-s8+/development/rom-t3901074 with odin and test with hard factory reset recoery.
After, flash odin last firmware stock sammobile

Thanks
Thanks for your reply deadedge7
As I said my s8 + is a duos g955fd variant and has an Exynos processor, I'm not sure that rooting it would make much of a difference, as to my understanding rooting doesn't really change the boot loader it just allows you to install a custom recovery and roms. Which is not much different to reflashing a stock rom for all intents and purposes , but I might give it a try anyway. I guess that maybe a rom like the one in the thread you shared might give me some more hidden codes access as a root but I'm not sure. I will try to find a root like it for my variant unless you know of one and can point me to it.
Thanks

Hard reset or flash stock software or hardware problem
For iemi best way is root efs with flash twrp best way for /EFS
https://forum.xda-developers.com/android/general/guide-restore-imei-fix-corrupted-efs-t3116217 read only

Bellboy4510 said:
Thanks for your reply deadedge7
As I said my s8 + is a duos g955fd variant and has an Exynos processor, I'm not sure that rooting it would make much of a difference, as to my understanding rooting doesn't really change the boot loader it just allows you to install a custom recovery and roms. Which is not much different to reflashing a stock rom for all intents and purposes , but I might give it a try anyway. I guess that maybe a rom like the one in the thread you shared might give me some more hidden codes access as a root but I'm not sure. I will try to find a root like it for my variant unless you know of one and can point me to it.
Thanks
Click to expand...
Click to collapse
I am facing the same issue. Same variant. latest update April 1st Security Patch. Data and texting work. but can't make or receive calls. Have you found any solutions?

@unbreakabl3
I am facing the same issue. Same variant. latest update April 1st Security Patch. Data and texting work. but can't make or receive calls. Have you found any solutions?
Click to expand...
Click to collapse
No solution so far. I've rooted the phone and install a couple of custom ROMs but still nothing. I'll try and roll back the firmware and see what happens. I'm no expert but I still think it is fixable. If I find a solution I'll post it on this thread. If you find one please share. My solution at the moment is getting a galaxy A50, very comparable performance with the S8 and really cheap.

Bellboy4510 said:
@unbreakabl3
No solution so far. I've rooted the phone and install a couple of custom ROMs but still nothing. I'll try and roll back the firmware and see what happens. I'm no expert but I still think it is fixable. If I find a solution I'll post it on this thread. If you find one please share. My solution at the moment is getting a galaxy A50, very comparable performance with the S8 and really cheap.
Click to expand...
Click to collapse
I'll keep that in mind. Couple of things to note: I don't get the message conditional call forwarding active. I don't think I ever have.
I tried a different carrier SIM card(T-mobile) and it worked (I'm on At&t). I was able to make and receive calls. Even tried an out of country SIM card and received calls. But my At&t SIM works on other phones perfectly. Go figure lol.
The only other reason I can think of is maybe cos it fell a couple of times from the couch. About 1.5ft. New case kept making it slide off.

Install (Phone INFO SAM).apk
check csc if they are all the same operator

deadedge7 said:
Install (Phone INFO SAM).apk
check csc if they are all the same operator
Click to expand...
Click to collapse
Here is the screenshot from the app

unbreakabl3 said:
Here is the screenshot from the app
Click to expand...
Click to collapse
Original missing and DBT and XSG not same
It must be all same
flash stock firmware odin bl ap cp and csc
Install apk phone info sam
Check csc original and all same
After flashing firmware stock, *#243203855# to choose good csc reset and test

Newbie from iPhone moved to android, got some questions please help me..

UPDATE:
I need an urgent help however.. I changed my csc to SPRINT from ATnT, using *#272*IMEI number# method. I kept changing to T mobile, and all, until I got stuck with SPRINT.
Now I tried the *#272*IMEI number# method and it won't let me do it with SPRINT CSC.
HELP please ( I just want to go back to ATnT or T mobile again..
Hi guys,
I just gave me iphone xs max to my wife since her iphone 7 is already too buggy and slow. Now that I moved to s10+, I love it and but the customization option is overwhelming me. Happy though that its customizable.
Then I realize 1 critical thing. I bought a snapdragon USA version of AT&T from local importer. I am located in Asia. When I looked at the software version, its only at "G975USQU1ASD3" with security patch, March 2019. I tried for 2 days now to get the OTA update and it just wont come. Saying that I already got the latest update.
Naturally I checked google and found so many updates, and one of them, night mode in camera, I really want. Now I am a newbie in all of these. My question is.. how do I get the non OTA update? I don't have a PC, but I might be able to use my work PC. I do have an micro SD card.
In summary:
1. Where to find the update files? the non OTA version
2. Is it doable without PC?
3. Can I just jump to the latest firmware update, or do I have to do it manually one by one?
4. Will it wipe my phone, because I spent hours customizing it before checking the problem.
Thank you very much if there's anyone willing to help me figuring things out.
regards,

torakun said:
Hi guys,
I just gave me iphone xs max to my wife since her iphone 7 is already too buggy and slow. Now that I moved to s10+, I love it and but the customization option is overwhelming me. Happy though that its customizable.
Then I realize 1 critical thing. I bought a snapdragon USA version of AT&T from local importer. I am located in Asia. When I looked at the software version, its only at "G975USQU1ASD3" with security patch, March 2019. I tried for 2 days now to get the OTA update and it just wont come. Saying that I already got the latest update.
Naturally I checked google and found so many updates, and one of them, night mode in camera, I really want. Now I am a newbie in all of these. My question is.. how do I get the non OTA update? I don't have a PC, but I might be able to use my work PC. I do have an micro SD card.
In summary:
1. Where to find the update files? the non OTA version
2. Is it doable without PC?
3. Can I just jump to the latest firmware update, or do I have to do it manually one by one?
4. Will it wipe my phone, because I spent hours customizing it before checking the problem.
Thank you very much if there's anyone willing to help me figuring things out.
regards,
Click to expand...
Click to collapse
1.You can download firmwares on sammobile.com for your model
2.You can use work PC but need get small software named Odin and samsung drivers for correct work
3.You not need install one by one you can flash directly to latest one but must use HOME_CSC and make backup with samsung app named smart switch which is already on phone if not you can get it on Google Play Store
Poslano z mojega SM-G975F z uporabo Tapatalk
---------- Post added at 06:40 AM ---------- Previous post was at 06:39 AM ----------
Btw you can use Frija software too fir download firmware
Poslano z mojega SM-G975F z uporabo Tapatalk

Hi, check the thread
https://forum.xda-developers.com/s10-plus/how-to/guide-g975f-flashing-megathread-faqs-t3936704
there are answers for all your questions=)

thank you very much guys!
I need an urgent help however.. I changed my csc to SPRINT from ATnT, using *#272*IMEI number# method. I kept changing to T mobile, and all, until I got stuck with SPRINT.
Now I tried the *#272*IMEI number# method and it won't let me do it with SPRINT CSC.
HELP please ( I just want to go back to ATnT or T mobile again..

To try and force a change of the csc power down your phone, remove the SIM card and boot up your phone without any SIM inserted. After the phone has completely booted up insert your SIM and you should get a message that the network settings are being updated.
I purchased an unlocked AT&T S10+ as well to use on T-Mobile. Since you don't actually have AT&T service I would very strongly recommend that you flash the U1 (unlocked) firmware. There are instructions for doing this in another XDA thread.
AT&T firmware is modded specifically for their messaging, network and WiFi services. Since I'm not an AT&T customer I got no OTA updates until I flashed the U1 firmware. Immediately after flashing the U1 firmware and booting up OTA updates were available to download and I receive OTA updates when they are available so there's no further need to manually flash updates using a computer.
The current U1 firmware has night mode for the camera and was just updated this week to the August security patch (which is good for Samsung).

jhs39 said:
To try and force a change of the csc power down your phone, remove the SIM card and boot up your phone without any SIM inserted. After the phone has completely booted up insert your SIM and you should get a message that the network settings are being updated.
I purchased an unlocked AT&T S10+ as well to use on T-Mobile. Since you don't actually have AT&T service I would very strongly recommend that you flash the U1 (unlocked) firmware. There are instructions for doing this in another XDA thread.
AT&T firmware is modded specifically for their messaging, network and WiFi services. Since I'm not an AT&T customer I got no OTA updates until I flashed the U1 firmware. Immediately after flashing the U1 firmware and booting up OTA updates were available to download and I receive OTA updates when they are available so there's no further need to manually flash updates using a computer.
The current U1 firmware has night mode for the camera and was just updated this week to the August security patch (which is good for Samsung).
Click to expand...
Click to collapse
Hi thank you very much for your help. I appreaciate it. However, as you can see from my opening post, I kinda did a mistake and locked myself out of AT&T now.. I am stuck with Sprint after changing CSC 3x feeling safe.. then Spint removed my ability to change CSC via *#272*IMEI#
:crying::crying::crying:

You shouldn't need to change the CSC using the dial code. If you cold start your phone without a SIM card then insert the sim after your phone has fully booted up you should get a message about your network settings updating.
I would also still recommend flashing the U1 unlocked firmware.

jhs39 said:
You shouldn't need to change the CSC using the dial code. If you cold start your phone without a SIM card then insert the sim after your phone has fully booted up you should get a message about your network settings updating.
I would also still recommend flashing the U1 unlocked firmware.
Click to expand...
Click to collapse
Hi thanks again for replying to me. I tried many times doing this but as soon as my SIM card got in, SPRINT OMADM took over.. I can't even get rid of the notification.. sigh..

This might help:
https://forum.xda-developers.com/sp...-to-remove-sprint-omadm-notification-t3636264
That's apparently something annoying that's specific to Sprint.
To get rid of any US carrier stuff on your phone I would still suggest using the modified Odin (which can be found in the XDA firmware flashing threads for the S10+) and flash the U1 firmware version which is carrier free.