Develop Bugs

[Q] Have unlocked Galaxy s3 and have a few questions

I just baught an unlocked galaxy s3. The guy i baught if from didnt know what carrier it came from or anything. So i was wondering if i flash a rom will i lose my unlock? Is there any way that i could accidently lose my unlock? How do i find out where this phone came from? And what if i do an update from the settings> about tab if there is one in the future?
Sent from my SGH-I747M using xda app-developers app

You can flash as many ROMs as you want, you will not loose the unlock. You can check where the phone came from by the software code, but don't bother with it. Go to sammobile.com download latest software for your carrier and flash it with Odin. If you want to root it and try some jelly bean ROMs you can get rooted software for your carrier here: http://forum.xda-developers.com/showthread.php?t=1739426

Irfdiddy said:
I just baught an unlocked galaxy s3. The guy i baught if from didnt know what carrier it came from or anything. So i was wondering if i flash a rom will i lose my unlock? Is there any way that i could accidently lose my unlock? How do i find out where this phone came from? And what if i do an update from the settings> about tab if there is one in the future?
Sent from my SGH-I747M using xda app-developers app
Click to expand...
Click to collapse
usually you can check the model no. on the back of the phone under battery and google search it for the service....

[Q] How to unlock SGH-i747m

How do I unlock the phone? I currently have Cm11 on it.
I want to ditch rogers (terrible service) so what do I need to do to unlock it?
side note, when I got the phone it was via future-shop warranty and they gave me a fido version and put my rogers sim in it, did they unlock it then?

SpacePotato said:
How do I unlock the phone? I currently have Cm11 on it.
I want to ditch rogers (terrible service) so what do I need to do to unlock it?
side note, when I got the phone it was via future-shop warranty and they gave me a fido version and put my rogers sim in it, did they unlock it then?
Click to expand...
Click to collapse
Since Fido is really owned by Rogers, your Rogers SIM may work in the phone if it was originally locked to Fido. To check whether it's unlocked or not, try putting in a non-compatible SIM (like Bell or Telus) and see whether it prompts you for an unlock code. If it does, you would need to purchase a code online or request one from the carrier. If it wasn't on Android 4.3 prior to the CM11 installation, you may be able to install stock Android 4.1.1 and free unlock. Either way, whether you are free unlocking or using an unlock code, you have to be on a stock ROM for it work. You can check your phone's settings and see what baseband and bootloader versions you have. This will tell us know whether you should flash stock 4.1.1 or 4.3

Larry2999 said:
Since Fido is really owned by Rogers, your Rogers SIM may work in the phone if it was originally locked to Fido. To check whether it's unlocked or not, try putting in a non-compatible SIM (like Bell or Telus) and see whether it prompts you for an unlock code. If it does, you would need to purchase a code online or request one from the carrier. If it wasn't on Android 4.3 prior to the CM11 installation, you may be able to install stock Android 4.1.1 and free unlock. Either way, whether you are free unlocking or using an unlock code, you have to be on a stock ROM for it work. You can check your phone's settings and see what baseband and bootloader versions you have. This will tell us know whether you should flash stock 4.1.1 or 4.3
Click to expand...
Click to collapse
Baseband is I747MVLUEMK5 bootloader I have no idea, I just used odin to flash CWM.
I'm open to flashing 4.1 to get a free unlock then going back to CM11

SpacePotato said:
Baseband is I747MVLUEMK5 bootloader I have no idea, I just used odin to flash CWM.
I'm open to flashing 4.1 to get a free unlock then going back to CM11
Click to expand...
Click to collapse
I747MVLUEMK5 is ver. 4.3 and you almost certainly have the 4.3 bootloader as well. With this, unfortunately, you can't downgrade to 4.1.1 where the free unlock option is available as any attempt to do this could brick your phone. You would need to request an unlock code from the carrier, if eligible, or purchase one online. There have been reports also that the unlock codes don't work when you are on a custom ROM so if you buy one online and it doesn't work, you will have to flash stock 4.3.

Larry2999 said:
I747MVLUEMK5 is ver. 4.3 and you almost certainly have the 4.3 bootloader as well. With this, unfortunately, you can't downgrade to 4.1.1 where the free unlock option is available as any attempt to do this could brick your phone. You would need to request an unlock code from the carrier, if eligible, or purchase one online. There have been reports also that the unlock codes don't work when you are on a custom ROM so if you buy one online and it doesn't work, you will have to flash stock 4.3.
Click to expand...
Click to collapse
ok, which carrier would I have to talk to, it was a fido phone as mentioned previously. Also is their a possibility I could downgrade to 4.1, or is it a guaranteed brick?

SpacePotato said:
ok, which carrier would I have to talk to, it was a fido phone as mentioned previously. Also is their a possibility I could downgrade to 4.1, or is it a guaranteed brick?
Click to expand...
Click to collapse
You would need to contact Fido since it was originally on their network. I'm afraid nobody has yet posted a method to allow you successfully downgrade to 4.1.1 and still preserve the free unlock functionality. You could follow some instructions posted in this forum to downgrade to 4.1.1. However, this wouldn't allow you downgrade the bootloader/modem which is required for the unlock.

Larry2999 said:
You would need to contact Fido since it was originally on their network. I'm afraid nobody has yet posted a method to allow you successfully downgrade to 4.1.1 and still preserve the free unlock functionality. You could follow some instructions posted in this forum to downgrade to 4.1.1. However, this wouldn't allow you downgrade the bootloader/modem which is required for the unlock.
Click to expand...
Click to collapse
ok thanks.

Larry2999 said:
I747MVLUEMK5 is ver. 4.3 and you almost certainly have the 4.3 bootloader as well. With this, unfortunately, you can't downgrade to 4.1.1 where the free unlock option is available as any attempt to do this could brick your phone. You would need to request an unlock code from the carrier, if eligible, or purchase one online. There have been reports also that the unlock codes don't work when you are on a custom ROM so if you buy one online and it doesn't work, you will have to flash stock 4.3.
Click to expand...
Click to collapse
I found a way to downgrade from 4.3 to 4.1.1 or 4.0.4 stock. (for Bell).
I bought and used Mobile Odin (available on the play store). Anyhow, it flashes the stock rom and not the old bootloaders. Once you're on 4.1.1 or 4.0.4 the problem is that *#197328640# no longer works. Basically when you type that ServiceMode comes up, but all the options are gone. I believe this is because they locked those features on the new bootloader (which is still on the phone after the Mobile Odin downgrade...)
Unlocking this phone has become a major pain in the ass.

htc_softbank said:
I found a way to downgrade from 4.3 to 4.1.1 or 4.0.4 stock. (for Bell).
I bought and used Mobile Odin (available on the play store). Anyhow, it flashes the stock rom and not the old bootloaders. Once you're on 4.1.1 or 4.0.4 the problem is that *#197328640# no longer works. Basically when you type that ServiceMode comes up, but all the options are gone. I believe this is because they locked those features on the new bootloader (which is still on the phone after the Mobile Odin downgrade...)
Unlocking this phone has become a major pain in the ass.
Click to expand...
Click to collapse
You are quite right. Sam and the networks are winning this time. You can indeed use Mobile Odin to downgrade the system (ROM). However, there hasn't been any reports of a successful downgrade of the bootloader. Therefore, even if you downgrade without bricking the phone, you can't free unlock. Tough but you will need a carrier unlock code.

[Q] Unlock Samsung S3 SGH-i747M (possible???)

Hello everybody
I have a Samsung S3 SGH-i747M (from Canada) with 4.4.2 and version I747MVLUFNE6 which is locked. It asks for "SIM network unlock PIN".
Is there any way (I don't care for the warranty) to make it work with an other SIM? I am currently in Switzerland.
Thank you very much in advance!

No you'll have to either call the original carrier of the phone and request the code or pay for the unlock code.

pre4speed said:
No you'll have to either call the original carrier of the phone and request the code or pay for the unlock code.
Click to expand...
Click to collapse
Do you know a reliable site where I can ask for the code?

There's lots of them out there. Pretty sure eBay has some and you can judge by their feedback and ratings...can't think of any specific ones right now though.
Sent from my SAMSUNG-SGH-T999 using Tapatalk

pre4speed said:
No you'll have to either call the original carrier of the phone and request the code or pay for the unlock code.
Click to expand...
Click to collapse
The problem is that I don't know at which carrier belonged the phone and one page that I found,that doesn't require the carrier and I think read that is reliable (swiftunlock.com), does not include the i747m in the list.
Any ideas or any other sites?

Any that offer it for the I747M should work. Don't take my word for it though. Ask the vendor first.
Sent from my SAMSUNG-SGH-T999 using Tapatalk

All the sites that i found ask for the carrier which I don't know or to have the phone rooted and have a version lower than 4.1.1 which I don't .
Is there any way to find out at which carrier it belonged?
Or any other reliable solution?
Please... :crying:

Go yo swappa.com and check the imei. I think it shows the original carrier when it does the check.
Sent from my SAMSUNG-SGH-I747 using Tapatalk

grgkots said:
Hello everybody
I have a Samsung S3 SGH-i747M (from Canada) with 4.4.2 and version I747MVLUFNE6 which is locked. It asks for "SIM network unlock PIN".
Is there any way (I don't care for the warranty) to make it work with an other SIM? I am currently in Switzerland.
Thank you very much in advance!
Click to expand...
Click to collapse
I just unlocked my SGH-I747M(canada Rogers/Fido) by down-grading to 4.11 and using the info from this thread "How to Unlock Your Samsung Galaxy S3 & Note 2 (No Rooting)"

found this in t-mobile thread. might be worth a check
err on the side of kindness

mrmike7 said:
I just unlocked my SGH-I747M(canada Rogers/Fido) by down-grading to 4.11 and using the info from this thread "How to Unlock Your Samsung Galaxy S3 & Note 2 (No Rooting)"
Click to expand...
Click to collapse
Free method will not work unless the bootloader is from 4.1.2 or lower.

audit13 said:
Free method will not work unless the bootloader is from 4.1.2 or lower.
Click to expand...
Click to collapse
That maybe true.....but I do know it doesn't work with ICS or JB 4.1.2 because [4] NW Lock NV Data INITIALLIZ does not show in menu.

mrmike7 said:
That maybe true.....but I do know it doesn't work with ICS or JB 4.1.2 because [4] NW Lock NV Data INITIALLIZ does not show in menu.
Click to expand...
Click to collapse
Once you are on the 4.3 ot 4.4.2 bootloader, you cannot downgrade the bootloader and the 4.1.1 modem will not work on the 4.3 or 4.4.2 bootloader.
You must be on at least the 4.1.1 dialler and modem.

mrmike7 said:
I just unlocked my SGH-I747M(canada Rogers/Fido) by down-grading to 4.11 and using the info from this thread "How to Unlock Your Samsung Galaxy S3 & Note 2 (No Rooting)"
Click to expand...
Click to collapse
Hey, I also have a I747 on Rogers on 4.4.2. Im looking to downgrade it to 4.1.1 like you did so I can sim unlock it. What process did you use to downgrade? Was it this: http://www.sammobile.com/firmwares/download/8565/I747MVLDLK4_I747MOYADLK4_RWC.zip/
THanks.
---------- Post added at 01:54 PM ---------- Previous post was at 01:53 PM ----------
audit13 said:
Once you are on the 4.3 ot 4.4.2 bootloader, you cannot downgrade the bootloader and the 4.1.1 modem will not work on the 4.3 or 4.4.2 bootloader.
You must be on at least the 4.1.1 dialler and modem.
Click to expand...
Click to collapse
damnit, just saw this. Is there any way to downgrade to unlock the SIM? What about if im on a different ROM?

There is no free way to sim unlock your phone once you have the 4.3 or 4.4.2 bootloader on your phone.

How to know on which bootloader ( bootloader 4.4.2 or 4.3) I am coz I was able to install a custom rom on my SGH-I747M The rom is dirty unicorn android 5.1.1 lolipop rom so Can I downgrade coz if I remember correctly I upgraded from stock 4.1.1 so can I downgrade to stock 4.1.1 by downloading and injecting it via odin is it possible or will it hard brick my phone and can you give me way to confirm what bootloader I have ???

Boot into download mode and look at the screen. If you see anything about knox, it likely the bootloader can't be downgraded to 4.1.1.

audit13 said:
There is no free way to sim unlock your phone once you have the 4.3 or 4.4.2 bootloader on your phone.
Click to expand...
Click to collapse
Can you guide me that how to know which bootloader do you have i.e. do I have a 4.3 or 4.4.2 bootloader how would I know that? and also I do have a custom dirtyunicorn rom with 5.1.1 so is it possible for me to flash the 4.1.1 stock SGH-I747M rom to it and then unlock it and then again add my current rom and use it???

Download and install the Samsung phone info app from the play store, run it, and look at the last three characters of the bootloader. If it is mk3 or higher, the bootloader can't be downgraded.

sim unlock for sgh-i747m 4.4.2 working need confirmation
audit13 said:
There is no free way to sim unlock your phone once you have the 4.3 or 4.4.2 bootloader on your phone.
Click to expand...
Click to collapse
Not quite sure where to put this but I have just successfully sim unlocked a samsung galaxy s3 sgh-i747m on 4.4.2 .This is only prelimary but upon unlocking and inserting a Public Mobile sim I was able to text on a Canadian Rogers S3. No further testing has been done. I first rooted the phone using Kingoroot and then downloaded the phoneinfo app from play store. I then used the app to get to service menu.At first service menu is blank but I used menu ,then key input Q, then back, then key input 0000,then back and then service menu appears. Now I am doing this from memory and no longer have the phone or another one at the moment to confirm this and will update this as soon as I can. But to the best of my knowledge I first went to UMTS(1) ,thenDEBUG(1), then Phone Control(?), then Network Lock.. Perso-SHA256 was on(1) I set it to off (0). I then backed out of the menu and shut down phone.I inserted PM SIM in phone and booted up .Phone didnt ask for unlock code and shortly I had texting service with Public Mobile. I dont have voice or data to check those but cant seewhy they wouldnt work. Anyway can someone confirm this working.My steps may not be exact but if it worked for me it should work for others.

[Q] Sim unlock on custom ROM. Tmobile support not being helpful.

So I'm currently in Europe and I will be here for 2 more months and I would like to unlock my phone because $4.19 a minute is ridiculous. However tmobile support is being, let's say very smart. The first representative said "just visit you're nearest tmobile store and we'll help you out there." After I had already told them I was in a country without tmobile. So I was wondering if there was any way to do this for free? I really don't want to have to spend any more money right now. I'm currently running liquidsmooth lollipops latest build. And I really don't want to have to revert to stock because I currently have Internet speeds of 85kb/s and that would take ages to download and then reset up my phone. All help is greatly appreciated.

You cannot. Need TouchWiz

serio22 said:
You cannot. Need TouchWiz
Click to expand...
Click to collapse
Which version should i downgrade to, and could you give me a like to a method of unlocking it?

Before flashing any TW ROMs via Odin, confirm the bootloader and modem on your phone.
I'm not sure but if the T999 is like the i747 (ATT s3 version), you cannot downgrade the bootloader from 4.3 to a lower version. Doing so may brick the phone.
If you are on a 4.1.1 or 4.1.2 bootloader, you should be able to downgrade to stock 4.1.1 and you may be able to unlock for free using this method: http://forum.xda-developers.com/showthread.php?t=2014982
If you cannot downgrade to stock 4.1.1, you'll need to buy an unlock code and enter it using a stock Samsung dialler.

Xfinity Mobile Note 8

Anyone have it? Anyone have any idea if it's the same version as Verizon? It's my understanding it's just the unlocked version. Open to flash any of the Qualcomm builds. But it runs Verizons network. Really just looking for any info anyone has on it.
Another thread about it got closed, but this is being posted in Q&A so this should not be closed.
Sent from my SM-N950U using Tapatalk

sinisin said:
Anyone have it? Anyone have any idea if it's the same version as Verizon? It's my understanding it's just the unlocked version. Open to flash any of the Qualcomm builds. But it runs Verizons network. Really just looking for any info anyone has on it.
Another thread about it got closed, but this is being posted in Q&A so this should not be closed.
Click to expand...
Click to collapse
I have a Xfinity note 8 but just got it. I would also like to know if it's unlocked.

rocksteady30 said:
I have a Xfinity note 8 but just got it. I would also like to know if it's unlocked.
Click to expand...
Click to collapse
I have this phone. Note 8 Infiniti mobile. Used it about a month now with no problems. Works flawlessly. Was originally sim locked to Infiniti mobile. But after entering unlock codes after paying it off no problems.
Sent from my SM-N950U1 using Tapatalk

safetypinz said:
I have this phone. Note 8 Infiniti mobile. Used it about a month now with no problems. Works flawlessly. Was originally sim locked to Infiniti mobile. But after entering unlock codes after paying it off no problems.
Sent from my SM-N950U1 using Tapatalk
Click to expand...
Click to collapse
i am working on trying to figure out which firmware can be flashed. and you need a unlock code for the sim lock

The Xfinity Mobile Samsung Note 8 (SM-N950U) is basically the same as the verizon branded phone. This means the bootloader is locked and will likely never be unlocked. This means you won't be able to install TWRP or load any of those custom roms
---------- Post added at 06:35 PM ---------- Previous post was at 06:32 PM ----------
You should be able to root it using the SamFail method but unfortunately there are restrictions
For example Magisk not working and it will fail safety net check.

Anyone with Xfinity Mobile who might be curious about doing this, I have successfully obtained root using SAMFAIL method... Follow his instructions exactly as written! When the device restarts after the second part of this tutorial you might end up with a blue screen that restarts the phone and flashes blue over and over, what I did next was I downloaded this firmware http://updato.com/firmware-archive-s...3AFA163EE8F90B and flashed the Home CSC file alone using the normal version of Odin 3.12.7 that is included in his post (with the Comsy version that was used in the first two parts). My phone came with original firmware so just a heads up. After flashing Home CSC, phone booted normally and SuperSU worked. Make sure you give everyone in that post credit for the amazing work with bringing us an option for root in such a short amount of time! If you have any questions please let me know and I'll help you as best as I can.

anyone using Tmobile sim after unlock? Is it working fine?

shahmayankn85 said:
anyone using Tmobile sim after unlock? Is it working fine?
Click to expand...
Click to collapse
Also curious about this. I'm looking at buying a used Xfinity Note 8, but am curious if it's carrier unlocked or not. Seller says it is paid off and he was using it on ATT without any issues. I know I can flash T-Mo or Unlocked firmware on it.

Mr. Orange 645 said:
Also curious about this. I'm looking at buying a used Xfinity Note 8, but am curious if it's carrier unlocked or not. Seller says it is paid off and he was using it on ATT without any issues. I know I can flash T-Mo or Unlocked firmware on it.
Click to expand...
Click to collapse
If seller paid it off and has entered the 2 unlock keys from xfinity you should have no problem. Mine works great on Verizon
Sent from my SM-N950U1 using Tapatalk

safetypinz said:
If seller paid it off and has entered the 2 unlock keys from xfinity you should have no problem. Mine works great on Verizon
Sent from my SM-N950U1 using Tapatalk
Click to expand...
Click to collapse
When info look at it, I'll pop in my T-Mo SIM and see what happens. If it's locked, I'm guessing I'll get the pop-up window to enter the unlock code.

Mr. Orange 645 said:
When info look at it, I'll pop in my T-Mo SIM and see what happens. If it's locked, I'm guessing I'll get the pop-up window to enter the unlock code.
Click to expand...
Click to collapse
Thats exactly what happens. If it's still asking for an unlock code. Make sure both were entered from xfinity. Don't let the seller tell you otherwise.
Sent from my SM-N950U1 using Tapatalk

sinisin said:
Anyone have it? Anyone have any idea if it's the same version as Verizon? It's my understanding it's just the unlocked version. Open to flash any of the Qualcomm builds. But it runs Verizons network. Really just looking for any info anyone has on it.
Another thread about it got closed, but this is being posted in Q&A so this should not be closed.
Sent from my SM-N950U using Tapatalk
Click to expand...
Click to collapse
It is the unlocked model, but it's also sim locked to xfinity. I use it constantly. It only comes with about 5 apps from xfinity and no other bloatware.

Sass86oh said:
Anyone with Xfinity Mobile who might be curious about doing this, I have successfully obtained root using SAMFAIL method... Follow his instructions exactly as written! When the device restarts after the second part of this tutorial you might end up with a blue screen that restarts the phone and flashes blue over and over, what I did next was I downloaded this firmware http://updato.com/firmware-archive-s...3AFA163EE8F90B and flashed the Home CSC file alone using the normal version of Odin 3.12.7 that is included in his post (with the Comsy version that was used in the first two parts). My phone came with original firmware so just a heads up. After flashing Home CSC, phone booted normally and SuperSU worked. Make sure you give everyone in that post credit for the amazing work with bringing us an option for root in such a short amount of time! If you have any questions please let me know and I'll help you as best as I can.
Click to expand...
Click to collapse
I am going to try doing this in about an hour. I'm hoping it works well. Thanks for the sharing.
Mr. Orange 645 said:
Also curious about this. I'm looking at buying a used Xfinity Note 8, but am curious if it's carrier unlocked or not. Seller says it is paid off and he was using it on ATT without any issues. I know I can flash T-Mo or Unlocked firmware on it.
Click to expand...
Click to collapse
The phone is carrier unlocked but Xfinity has it SIM locked to their SIM. If you send them a message or call them however, they will email you a unlock code within 3 days. I have a few phones with them and this is what I did, they are all SIM unlocked now

Man this phone is so good without root I can't imagine rooting it. Between Samsung Themes, and Substratum my phone is totally themed out.
Sent from my SM-N950U using Tapatalk

Using xfinity note 8 with oreo full version want too downgrade back too nougate.
Hello everyone first thank you for reading and commenting on my post.
I have a xfinity mobile devicè that originally came with nougate 7.1.1 and I flashed it by sd card flash. I have a few bugs like 1. Security notification that keeps popping up all the time.
2. When watching you tube after a while the app get stuck and usually just have too restart and then works fine till the next time.
3. I cant send messages with pictures or videos thru stock messaging app from samsung. I can send text thru samsung message app. So I downloaded the Verizon message app and it works fine using that app because xfinity uses Verizon for carrier service LTE.
I am wondering first what is the exact correct firmware for xfinity mobile on note 8.?? Where can I get it from?
( I know the original firmware had a "j" in it) for nougate 7.1.1
If I cant fue the bugs on oreo 8.0 full version "please tell me how? Then...Next thing is I have oreo 8.0 with samsung experience 9.0 can I and how do I downgrade back to nougate correctly but I tryed and was unsuccessful. I tryed downloading a firmware off the internet and storing it and renaming it on sd card so I can flash it while in dfu mode. But it didnt work.
So bottom line is if I can just fix those bugs and stay on full version oreo 8.0 then please tell me how?
Otherwise please tell me how and where I can achieve downloading the exact firmware build for my phone and the samsung experience 8.0.? I need too know if its possible and where too get everything from and instructions how? Thank you all my XDA friends

raver445 said:
i am working on trying to figure out which firmware can be flashed. and you need a unlock code for the sim lock
Click to expand...
Click to collapse
,) +8

vonDubenshire said:
,) +8
Click to expand...
Click to collapse
What do you mean by that
Sent from my SM-N950U using Tapatalk

Xfinity Boot Screen After Unlock
I have a Xfinity Note 8. I paid to have it unlocked so I could sell it easier. I have flashed many S8, S8+ but no Note 8 or Xfinity. Typically after an unlock, with a new SIM it would carrier flash after reboot. This one does not. I used my sons Verizon SIM no problem but it still had the Xfinity splash screen and apps. Could I resolve this through flashing with oden? I’m afraid to try since this is the first Xfinity phone I’ve come across. Any help or tips is appreciated!

tryn722 said:
I have a Xfinity Note 8. I paid to have it unlocked so I could sell it easier. I have flashed many S8, S8+ but no Note 8 or Xfinity. Typically after an unlock, with a new SIM it would carrier flash after reboot. This one does not. I used my sons Verizon SIM no problem but it still had the Xfinity splash screen and apps. Could I resolve this through flashing with oden? I’m afraid to try since this is the first Xfinity phone I’ve come across. Any help or tips is appreciated!
Click to expand...
Click to collapse
You would have to reflash the Note 8 with the carrier unlocked firmware. The one you would buy from Samsung where there would be no carrier branding you would get the firmware from XDA Developers and they would provide guys in tutorials and how to flash the non carrier-branded firmware to the Note 8
Sent from my LG-H932 using Tapatalk

raver445 said:
You would have to reflash the Note 8 with the carrier unlocked firmware. The one you would buy from Samsung where there would be no carrier branding you would get the firmware from XDA Developers and they would provide guys in tutorials and how to flash the non carrier-branded firmware to the Note 8
Sent from my LG-H932 using Tapatalk
Click to expand...
Click to collapse
Using Samfirm, what region would I enter? OR, If I download from SamMobile, should I just use the USA version. I see mine SM-N950USQ3BRA6 listed as (Unknown).
I would like the phone to carrier flash with each SIM so they buyer won't be intimidated. With the other phones if done this with, usually other S8, S8+, I haven't had to do it but twice for AT&T S8's. For some reason those in particular will sometimes not recognize the SIM even after unlocking and flashing through SamFirm and Oden has done the trick. I'm sort of a newb. I used to flash ROMS years ago but recently find myself buying and selling for profit. Thanks for your help!!
I'll try later and post my results.