yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8 Guides, News, & Discussion] nlandas:
Using Gear S3 w/US Unlocked S8 (Best Buy) on AT&T network

So, I realized that you may have been switching carriers when I merely wanted to flash the carrier firmware (AT&T) instead of the unlocked firmware since I already have AT&T. I simply used ODIN (v3.12.7) and downloaded all of the current AT&T carrier specific firmware (giving me the bloatware but also giving me the HDVoice feature I needed for NumberSync to work on the Gear S3 frontier smartwatch). Previously, when going into Settings, Connections, then Mobile Networks I did not have Enhanced LTE Services. Now I do. I plan to get the new SIM card and call AT&T tech support to get the "toggle" matter fixed asap.

Flashing the carrier firmware in place of my unlocked firmware did the trick. Your persistence in fixing the other issues regarding WiFi and NumberSync is going to be why I will not lose my sanity. :fingers-crossed:

Flashing Carrier Firmware in place of Unlocked Firmware that lacks Carrier-Specific Features https://xdaforums.com/showpost.php?p=74087669&postcount=3

01-29-2018@ 7:42 PM PST--UPDATE: So, I can only make calls to others on the AT&T network. I got Wi-Fi calling to work and can call non-AT&T numbers using that. But good ol' cellular won't allow it. I toggled Enhanced LTE Services off and restarted, but still no calls to non-AT&T lines. Another ticket created for tech support. NumberSync is showing up on the AT&T website, but my phone shows up as an unknown device (also shows up as a blank icon for my model). I told them to look at IMEI also. But, they're saying SM-G950U1 devices not supported (which is malarkey - I informed them that I have firmware for G950U device)The watch icon shows up under NumberSync but is there with a red exclamation point.
[Samsung Galaxy S8 Guides, News, & Discussion] Mr. Orange 645:
Just FYI, it appears with the new Blv3 firmwares, the device will only accept official firmware. Meaning, no more flashing U1 firmware on the carrier models, or vice versa. No more flashing U or U1 firmware to the Canadian W models. Flashing between carrier firmwares is fine as long as it's on a carrier branded device (running TMB on a VZW device, etc). But running 950U firmware on a 950U1 will result in a brick, that is this far unrecoverable.

If your currently are running U1 firmware on a U device, vice versa, or running W firmware on a U or U1 device, or vice versa, you need to flash back to the firmware version that shipped with your device BEFORE you accept any OTAs that take you up to Blv3. Currently the S series is still on BlV2, but may go to Blv3 like the Note series just did.*

This has been tested and confirmed.

Credit goes to [MENTION=4591212]me2151[/MENTION]*, [MENTION=7263822]FatalONEM8[/MENTION]*for discovering this and warning people. I didn't find the issue or test, it just passing on the info to hopefully save some bricks.
[Samsung Galaxy S8 Guides, News, & Discussion] nfremd:
So If I own a Sm-G950U1 but I have been running G950U Tmobile Oreo beta and upgrade to the stable oreo I'll brick my phone? In order to prevent this I'll have to first go back to G950U1 on nouget and then go up to oreo? Or can I just stay on the version I have and accept that I can't go back to unlocked firmware?

I don't really want to do this because I am loving using the T-Mobile variant because it gives me multiuser (digits) since it's built in.
[Samsung Galaxy S8 Guides, News, & Discussion] iphonehomemobile:
does flashing with this method provide domestic sim unlock?

does flashing with this method provide domestic sim unlock in usa?
[Samsung Galaxy S8 Guides, News, & Discussion] bboii86:
No.
[Samsung Galaxy S8 Guides, News, & Discussion] mapki:
sprint bad esn unlock for overseas usage

can I unlock this Sprint bad esn phone (i.e. cahnge spr to vzw)? I will use it overseas
[Samsung Galaxy S8 Guides, News, & Discussion] uwapalwa:
Changing firmware wont unlock it
[Samsung Galaxy S8 Guides, News, & Discussion] billa:
Yes, this is due to the new RMM (Remote Monitoring Management) security, via the RLC app.

There are a number threads about it describing how to disable it.

Basically if you wait 168 hours (about 7 days in a row) with the phone powered on without touching it during this time, the RMM will reset and you can flash back to stock again.

It's a really nasty curveball by Sammy, like will create a lot of misery.

The official Samsung RMM portal: https://rmm.samsung.com/

For now you can try installing this:

Samsung_RLC_v1.1.15.APK

https://www.androidfilehost.com/?fid=673956719939818841

Then disable the package by:

adb shell pm uninstall --user 0 com.samsung.android.rlc

In build.prop set "ro.security.vaultkeeper.feature" property to 0, like this:

ro.security.vaultkeeper.feature=0

In the file services.jar / smali / com / samsung / android / rlc / service / RmmTask.smali you can see:

.field private static final CscFeature_RMM_EnableCode: Ljava / lang / String; = "CscFeature_Common_SupportRmm"

const-string / jumbo v30, "Theft protection support device"

: cond_20e

const-string / jumbo v29, "boot_time"

invoke-static {}, Ljava / lang / System; -> currentTimeMillis () J

move-result-wide v30

invoke-static {}, Landroid / os / SystemClock; elapsedRealtime () J

move-result-wide v32

sub-long v30, v30, v32

invoke-static / range {v30 .. v31}, Ljava / lang / String; -> valueOf (J) Ljava / lang / String;

Which shows that the RMM lock is somehow connected to the CSC, so perhaps with the CSC file manipulation we can circumvent this somehow. So maybe flashing an older than Jan 2018 CSC might not trigger RMM.
[Samsung Galaxy S8 Guides, News, & Discussion] psycho2097:
Hi I'm new to the S8 community. Running U1 firmware on a Tmo US device on Tmo US network. Want to flash Oreo, but it's only available on the VzW U firmware. Is there any way to flash VzW U firmware w/o full data wipe, or easier to just wait for Tmo U Oreo and then do a full wipe? I don't think there's any other risk in flashing U firmware from other carriers, but just wanted to ensure I'm thinking about this right.
[Samsung Galaxy S8 Guides, News, & Discussion] uwapalwa:
I am not sure if you mean this is applicablento all devices, but i have to disagree with the Note 8 N950U from sprint. I have unlocked it for 3 guys and after that I flashed N950U1 RA5 BLv3. The phone initially had n950u RB4 which is also BLv3

Their phones all work just fine
[Samsung Galaxy S8 Guides, News, & Discussion] Mr. Orange 645:
First of all, the Blv3 issue was debunked as a false alarm. There is no issue. Second, your confusing the waiting period for the OEM Unlock button on Exynos devices with what I was talking about.

You will be fine. There is no issue with the Blv3 or flashing different carrier firmware.

Again, not sure why all of a sudden people are talking about this, but the whole Blv3 issue was debunked as a fluke.
[Samsung Galaxy S8 Guides, News, & Discussion] uwapalwa:
1. Because your post was not so old

2. Because those who dont kno much about what all this means only saw the words U1, and brick.

But glad you cleared it up
[Samsung Galaxy S8 Guides, News, & Discussion] billa:
We might be fine now, but with any update Sammy could introduce this nasty lock even on QC, so I think it's better to at least talk about rather than bury our heads in sand. imho
[Samsung Galaxy S8 Guides, News, & Discussion] Mr. Orange 645:
Ok. Talk away. Just make sure everyone knows you're talking about hypothetical theories then, cause Samsung has NOT introduced this lock.

To be fair, Samsung could do ANYTHING at ANY TIME. But they haven't. And likely won't. Matter of fact, they are doing the opposite with the BYOD firmware.
[Samsung Galaxy S8 Guides, News, & Discussion] zoomos:
I'm currently on G955USQU2ZQKM, so that means I'm on version 2 bootloader?

I'm on oreo now, the phone is an at&t S8+ (unlocked) but I'm on tmobile and I want to downgrade to the tmobile version of nougat so I can update to oreo direct from tmobile.

I'm trying to figure out the best course of action here. Do I have to replace the bootloader and the csc home thing or can I just flash the firmware and it will be unbranded from at&t?
[Samsung Galaxy S8 Guides, News, & Discussion] eeshlikhith:
So the unlocked S8 OTAs for U1 are going out today. My phone is a SIM unlocked TMo unit. I flashed the international U1 firmware on it and now my CSC is XAA. Can I take the OTA for Oreo and skip flashing back to U firmware?
[Samsung Galaxy S8 Guides, News, & Discussion] kleinbiker:
I have a Verizon S8 and am looking into installing the U1 firmware for a bloat free experience. I am planning to use this with an AT&T MVNO.

To that end, what is the difference between the instructions listed in this thread vs. https://xdaforums.com/galaxy-s8/how-to/rd-carrier-switch-root-snapdragon-t3597473.

Are the steps in the other thread sufficient for my scenario? Thanks.
[Samsung Galaxy S8 Guides, News, & Discussion] svhyd:
Has anyone tried going from AT&T unlocked to Sprint?

Sprint said my G955U's IMEI is compatible. So I switched to them only to find out I can't make/receive any calls. Will flashing it to SPR version of firmware fix the problem? Has anyone done this? Thanks for any ideas!

I wanted to follow the instructions here:

https://xdaforums.com/galaxy-s8+/how-to/snap-guide-flashing-standard-fw-carrier-t3627255

But wanted to confirm if it will work. Does this model have CDMA bands on it? Specs on gsmarena dot com says it does but not really sure.

UPDATE:

From this AT&T forums post , I learnt that AT&T actually blocks the CDMA bands. So I went ahead and followed the original instructions for Carrier Switching for S8+ and now my phone detects the Sprint SIM card and I'm able to text/call. Data also works.
[Samsung Galaxy S8 Guides, News, & Discussion] JeffATL:
Which rom did you use?
[Samsung Galaxy S8 Guides, News, & Discussion] svhyd:
G955USQU1AQJH

https://updato.com/firmware-archive-select-model?record=74283051DAF111E7A5F9FA163EE8F90B

After I loaded the Sprint f/w, I'm getting several direct updates from Samsung. I'm at G955USQS2BRB1 (Android 7.0) now. Next scheduled update is G955USQU2CRB9/G955USOYN2CRB9 (Oreo).
[Samsung Galaxy S8 Guides, News, & Discussion] A_N_D_R_E:
(DELETED)
[Samsung Galaxy S8 Guides, News, & Discussion] netzih:
Have the G955U1 (unlocked phone from Samsung) carrier switched to sprint. (so running G955U now) and running OREO RC5 software.

When i switched from sprint to T-Mobile I put my T-mobile sim card in it switched CSC to TMB but now trying to do carrier switch to TMB RD4 software and it is not working with ODIN or Prince comsey.

With regular Odin getting error on download mode "sw rev check fail fused 2 binary 1 " and in prince comsey I'm getting model mismatch error.

Any way to fix this?
[Samsung Galaxy S8 Guides, News, & Discussion] bboii86:
Yeah, any Oreo odin file requires the new odin version 3.13.1
[Samsung Galaxy S8 Guides, News, & Discussion] netzih:
Thank you. Downloading it now

Do I need to go through the whole carrier switch (in the beginning of this thread) or can I just flash TMB files straight with odin?
[Samsung Galaxy S8 Guides, News, & Discussion] bboii86:
Just flash the TMB files with Odin and you should be good to go.
[Samsung Galaxy S8 Guides, News, & Discussion] netzih:
Searched google and couldn't find anywhere mentioning the new ODIN.

Seems to be working now. Flashing software now.

Thank you
[Samsung Galaxy S8 Guides, News, & Discussion] bboii86:
No problem.

This is the link to Odin 3.13.1

https://drive.google.com/file/d/10dSyPTuccP8Km9MnDrvbRdS-CAcgFZB3/view
[Samsung Galaxy S8 Guides, News, & Discussion] netzih:
I meant I could not find any mention of needing the new odin.

Once you told me about it I was able to find it.

Thank you again
[Samsung Galaxy S8 Guides, News, & Discussion] trungctu:
May I change my S8 active from Sprint to TMobile with this approach?
[Samsung Galaxy S8 Guides, News, & Discussion] FatalONEM8:
You might be able to with the factory binary for the G892U and change the CSC to SPR
[Samsung Galaxy S8 Guides, News, & Discussion] netzih:
Just flashed TMB over XAA in Odin on G955U1. Wifi calling and samsung video calling are not working. Would it make sense that it is not working because I did not go through all the steps to flash factory binary first (just flashed TMB over XAA)?

And if yes does flashing factory binary still work from Oreo?
[Samsung Galaxy S8 Guides, News, & Discussion] FatalONEM8:
What? What build are you on? BYOD has been included as a feature since U2BQK5. All you have to do is put in a T-Mobile sim and reboot and boom done. TMB/TMB/TMB
[Samsung Galaxy S8 Guides, News, & Discussion] netzih:
I'm on 3CRD4 Showing TMB/TMB/XAA

What's weird is I'm pretty sure it worked when I just got service and it stopped once porting my phone number in. (though T-Mobile says that it does not make sense so I'm starting to think maybe I never had it)

---------- Post added at 05:22 PM ---------- Previous post was at 05:07 PM ----------

Was thinking to try the whole process with factory binary and seeing if that would help but wanted to make sure that it is possible to flash factory binary from oreo.
[Samsung Galaxy S8 Guides, News, & Discussion] tempests:
I just changed over an unlocked (FYI must call Sprint to unlock), Sprint variant Galaxy S8+ phone to the full no carrier, unlocked, bloatware free firmware. I used the Modded Odin v3.13.1 Raymonf and the latest non carrier firmware. I changed nothing else on the phone, except put into Developer's mode before flashing. Plugged in my sim card and the phone works flawlessly on T-Mobile. I did have to follow the directions on T-Mobile's site on how to set up the radio frequencies.

I also flashed an unlocked Sprint S8+ phone to MetroPCS, using the latest Metro firmware. No Metro logo was installed, so the phone just boots up without showing it. I assumed it is because it really is a T-Mobile firmware with Metro bloatware. All bloatware is installed and the phone works fine on Metro.
[Samsung Galaxy S8 Guides, News, & Discussion] nmashe1:
Can you advise exactly which Latest MetroPCS firmware you used for 955u and point me and right direction where to obtain it?

I have carrier-unlocked ATT 955u, when I first got the phone I did the flash Canadian firmware, then flash Tmobile. Phone worked flawlessly (WIFI Calling, VOLTE, Video in Dialer, etc) on MetroPCS even though it showed TMB/XAA/ATT.

Aftet 3/19 2CRB9 update, I lost all advanced features and phone can't connect to IMS. MMS and 4G LTE work fine. This behavior is with Metro SIM.

If I put active T-Mobile SIM in phone, all advanced features come back and CSC changes to TMB/TMB/ATT.

Need advice how to get back wifi calling, video chat, etc with Metro SIM on S8+. Phone is on 8.0
[Samsung Galaxy S8 Guides, News, & Discussion] Tiffany84:
Hi, I was wondering if someone could help me out? I'd even be willing to pay if need be. But I want to flash a T-Mobile Galaxy S8 that's been Sim unlocked to Verizon but I'm not sure the exact steps to take. If you could just tell me the latest method that works I can do the work. I've been reading the thread for awhile now and I'm just seeing several different methods and I just want to make sure I'm doing it right. Any help would be greatly appreciated. Thanks
[Samsung Galaxy S8 Guides, News, & Discussion] kmcmahon079@gmail.com:
i to have being following this tread but am not sure what to do i have a verizon s8+ but now that o am home in Ireland when i insert my sim card it works but i have a stupid message saying ( sim card is not from verizon wireless ) how can i stop this
[Samsung Galaxy S8 Guides, News, & Discussion] loser7787:
Need help!

Man, I am usually able to figure this kind of stuff out from all of the guides available but I have some questions before trying to flash.

I have a T-Mobile branded S8 baseband version: G950USQU3CRD4 | Model SM-G950U, I use straight talk on the tmobile network and get horrible service at work. So I have wanted to switch over to Verizon or AT&T. It seems like AT&T I can just pop a sim in and I would get everything except 2G which I could live with but I was hoping to flash to unlocked US (XAA) firmware and use verizon or just flash to verizon.

All of these guides seem to not mention any issues of being on bootloader V3 besides the scare about possible hard bricks. Will I see issues flashing to the firmwares listed in the guides? Specifically this thread lists factory binary, engboot and 950w firmware. I am not sure which firmwares to download to avoid a brick during flashing for my model specifically since most links lead to pre oreo as well as V2 bootloaders. From what I have read you cannot flash a lower version bootloader on top of your current.

If someone cant point me in the right direction for the exact files I need or if any would work and then I can just use OTA updates to get back up to current after flashing an old firmware I am fine with that.

I have searched and read everything I THINK and its a last resort to reach out for some clarification, I truly appreciate someones time if they could help me out here.

Thank you.

---------- Post added at 11:12 AM ---------- Previous post was at 10:49 AM ----------

Holy crap, so I popped a verizon sim in my phone and restarted and it made it the Verizon version phone? Is that all I have to do???

I did buy my s8 from samsung directly but it came branded as tmobile....Can I simply switch sims and the s8 will update and enable/disable bands accordingly?
[Samsung Galaxy S8 Guides, News, & Discussion] yeltrah123:
I need steps for S9+
[Samsung Galaxy S8 Guides, News, & Discussion] tempests:
Not true. I have an unlocked Sprint S8+. I put in my Metro PCS sim card, contacted Metro to activate phone and rebooted. While I'm able to use the phone, it shows TMK/SPR/SPR. MMS messages do not work with a photo attachment
[Samsung Galaxy S8 Guides, News, & Discussion] JamesHasty:
Thanks!

Worked like a charm! Thank you!
[Samsung Galaxy S8 Guides, News, & Discussion] Raincouverite:
can you teach me what you did?

I have a canadian g950w
[Samsung Galaxy S8 Guides, News, & Discussion] ahmedalfadhli100:
Hello Dear

I used your method to change reigon.

I change from EGY to VZW and work good but I have problems

1- when the phone turn on feature message (SIM card changed) restart your phone

2-the mobile network not changed to LTE/CDMA

3-when a call with gsm network failed to call and call ended

4-the sceret code not working
[Samsung Galaxy S8 Guides, News, & Discussion] mynock25:
Can I download any version of the firmware if I want to switch to XAA? Or should I go with that of my current carrier? I can't find ONE version of firmware, there seems to only be different options based on your carrier, and that's what I'm trying to change.
[Samsung Galaxy S8 Guides, News, & Discussion] hightech316:
Thanks for the guide.

After going through the thread I am unclear on if I need to flash the CSC of the desired carrier I want to switch to or not ...

I have a SM-G955U on Oreo firmware boot version 3 ( I have all necessary files ) . During download mode , Carrier states " Sprint " .

Would like to use it on MetroPCS.

I am unable to find MetroPCS Firmware on any main firmware site, So I figured T-Mobile would be ok.

That being said, Should I flash Combination file, then T-mobile CSC then my " desired " firmware ? Or is G950W required ? Don't understand why "W" variant is used.

At the moment my s8 sees the MetroPCS SIM , but will not register on network.

EDIT:

Put SIM, called rep to transfer. Done
[Samsung Galaxy S8 Guides, News, & Discussion] Charkatak:
I need a solution for Sprint Galaxy S8 Active which will convert to T-Mobile. I guess needed file are factory binary and some other csc files.
[Samsung Galaxy S8 Guides, News, & Discussion] Charkatak:
Is this method possible with S8 Active? If yes, where to get needed files?(factory binary for example)
[Samsung Galaxy S8 Guides, News, & Discussion] Charkatak:
Did you find any info on flashing S8 Active? Mine is SM-G892U
[Samsung Galaxy S8 Guides, News, & Discussion] sapphirecoupe:
Does the device have to be carrier unlocked first? Can this be done on phones on 8.0?
[Samsung Galaxy S8 Guides, News, & Discussion] squash777:
Using mxplorer I Found that if I select and hide I could move the unmovable files. Fist move your carrier csc elsewhere than move in the other. Probably able to do this with adb shell toybox if I knew more about code. Thought this could possibly help someone so I went from u4cre9 to oyn4cre9 by removing att and putting the xxa file in its place no I'm not rooted I just got sent this phone 4 days ago to replace my S7 active I had the pink and green snot down the screen

---------- Post added at 02:12 PM ---------- Previous post was at 02:03 PM ----------

MiXplorer my bad
[Samsung Galaxy S8 Guides, News, & Discussion] A0425A:
Hi All. Looking for some help. Trying to get a US TMB phone loaded with U1 fireware back to TMB firmware. I went ahead and loaded the factory binary as per the first few steps and rebooted into bootloader mode after the factory binary loads. I'm getting an error when I try and load the EngBoot using modded Odin. I can't read the whole error because my eyes are too old but it says Error sw rev check fail: [can't read] Fused 5 > Binary 1 in part of the message that I can see. EngBoot file name is 950U.tar I found on another thread.

Edit:

Since I was on BL5 I used the bit-5 combo file, but I'm not sure if the EngBoot also needs to be bit-5 and I'm not even sure one is out there as a read more and more.

TIA
[Samsung Galaxy S8 Guides, News, & Discussion] jpcdeux:
You're doing too much. Go to Updato.com and download the latest TMB firmware. You'll need the newest Odin (https://drive.google.com/open?id=1JMjqNxg8Y8W-Tpo9TCYIb_LL7LhhpHri). Put in download mode, install everything except HOME_CSC. Keep it simple, don't over complicate it with Bit-5 and EngBoot crap.
[Samsung Galaxy S8 Guides, News, & Discussion] CLKeenan:
Im able to go through all the steps fine and when I boot up for the first time without a SIM card, my CSC is set to XAA (which is want I want). However, once I put in my UK EE SIM card, the phone forces a restart and then the CSC is changed to GCF (Unknown Global). How can I prevent the CSC from changing from XAA to GCF? If there is no way to prevent that, is there any way to install new firmware updates without having to do a factory reflash and lose all my data/settings?
[Samsung Galaxy S8 Guides, News, & Discussion] Pieman7373:
S8 active

Will this work on an s8 active g892u?
[Samsung Galaxy S8 Guides, News, & Discussion] Ph3n0x:
If you have the device combination files they are different from the normal s8 it should but not sure if it will have all the csc codes
[Samsung Galaxy S8 Guides, News, & Discussion] erikthedead:
S9 remove rlc

Hey, I'm on an s960U ATT s9 I'm not doing a new firmware install, I found this thread by Googling com.samsung.android.rlc because I'm using ADB on my Parrot linux os laptop to remove the crap out of by girl's not rooted S9. I'm finding interesting stuff on it, some sites are saying it's to stop some 7 day wait period, you guys talk about it as a step to remove carrier restrictions. In your step - billa - you remove it. What is the apk you said to install before doing that and why? Can I just remove this crap? :confused:
[Samsung Galaxy S8 Guides, News, & Discussion] Moyo18:
have you find the files?
[Samsung Galaxy S8 Guides, News, & Discussion] Charkatak:
I did find, but I had to purchase the file($5) from one of the websites because I needed the latest version of it. All the searches would give me an older version which I couldn't flash.
[Samsung Galaxy S8 Guides, News, & Discussion] OfficialPyroh:
tried to flash the home_csc and it said failed :(