yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8 Guides, News, & Discussion] august_:
Hi again, a quick update. I followed the process and managed to get the carrier changed to XAA. However, when I lop in my sim card, I have the same issue again. Do I need an American one in the first place, and then I'll be free to use any? Or is there a way to avoid this?
[Samsung Galaxy S8 Guides, News, & Discussion] UmbreWolf:
Shoudn't matter or atleast I don't think it does, only thing I can think of is that the uk uses the Exynos vraint of S8 (different processor, lacks CDMA carrier support.) but I don't think that has much to do with it if its already unlocked for a sim card.

---------- Post added at 09:33 AM ---------- Previous post was at 09:20 AM ----------

Ok....time for a little help with mine. I already have all the prerequisites and everythig ready but before I begin...id like a little input...for confidence sake.

I have a Galaxy S8 G950U

It is a Sprint S8, However it is Sim card unlocked with XAA and I am actively using it with a straight talk sim card.

Oreo...It had recently updated itself to Oreo and my god...the oreo firmware from sprint is just....horrid. I don't know what it did but ive literally lost half my LTE bands, my signa now sucks (using the straight talk sim, having messaging issues and all kinda of just...bugs.

What Id like to do Is flash over to an unlocked firmware (G950U1) running back to Nougat 7.0

I am currently using the latest Sprint firmware, running Oreo 8.0

G950USQU2CRC5

Bootloader version 2

CSC=SPR/XAA <----- Am I support to only have one CSC or is this normal when you unlock a branded phone for other carriers? (UICC unlock for simcards)

Is it still possible for me to roll back to 7 using an unlocked u1 firmware or is it too late? I have heard of people having issues running oreo reverting back to order firmwares...

---------- Post added at 09:58 AM ---------- Previous post was at 09:33 AM ----------

I did manage download the recent Unlocked firmware thats running oreo using Samfirm, should I try that first, see if it helps?

Was debating the T-mobile firmware (straighttalk sim is using t-mobile towers, I need them bands back x.x
[Samsung Galaxy S8 Guides, News, & Discussion] satellite779:
Had issues flashing Verizon S8 to Unlocked firmware following this guide.

Had to use patched Odin but newer version:

https://xdaforums.com/android/software/patched-odin-3-13-1-t3762572

Downloaded firmware from updato.com:

https://updato.com/firmware-archive-select-model?record=228AE8DC387311E89F15FA163EE8F90B

Hope this helps someone.
[Samsung Galaxy S8 Guides, News, & Discussion] rotorrocket:
Successfully flashed my S8 from Verizon to T-Mobile.

Software update check doesn't pull in the Oreo update.

Will this require a manual process or will it show up eventually?

Oreo has been out on T-Mobile for a while now. Thx
[Samsung Galaxy S8 Guides, News, & Discussion] satellite779:
Do you have T-mobile SIM card in the phone? Apparently, OTA updates don't work with MVNO sim cards.

Why didn't you just flash it with Oreo firmware?
[Samsung Galaxy S8 Guides, News, & Discussion] rotorrocket:
Don't have a T-Mobile SIM. Using an MVNO so it seems you're correct about getting OTA updates.

Didn't see Oreo at the time when I flashed over to T-Mobile Ugh!
[Samsung Galaxy S8 Guides, News, & Discussion] satellite779:
I can't post links because I'm new but I can see T-Mobile Oreo firmware on updato website, just make sure it matches your bootloader version.
[Samsung Galaxy S8 Guides, News, & Discussion] rotorrocket:
thx +1
[Samsung Galaxy S8 Guides, News, & Discussion] charlesfair:
Thank you so much you saved me odin kept failing

it actually worked and got rid of my at&t bloat thanks you should add this to the guide as it works well
[Samsung Galaxy S8 Guides, News, & Discussion] ZuluAlpha:
ATT Bootloader v2 Firmware

ATT Bootloader v2 Firmware

https://xdaforums.com/att-galaxy-s8/how-to/att-s8-stock-odin-files-firmware-t3730893
[Samsung Galaxy S8 Guides, News, & Discussion] alirz:
Can the carrier switch steps still be performed on Oreo?

It looks like the Factory Binary to use might still be the same as before but the Home CSC and other files to be used will obviously need to be for Oreo?
[Samsung Galaxy S8 Guides, News, & Discussion] davidkwill:
carrier switch, recovery messages, etc

I have a t-mobile branded sm-g950u. I am on att and on blv3. When I go into recovery mode i see this at the bottom of the screen

#Fail to open recovery_cause (no such file or directory)#

#reboot recovery cause is [UNKNOWN]

Support single-sku

File-based OTA

Support API:3

Manual mode v1.0.0#

Remove failed dir /system/carrier/att/priv-app/attiqi_att (no such file or directory)

E: libfs_mgr Error fetching verity device number: no such device or address

E: libfs_mgr Couldn’t get verity device number

E: error removing device mapping: no such device or address

the phone is working fine. I am trying to findout my current/active CSC. In the phone info app it says active CSC is ATT. If i go to download mode it says at the top that carrier is TMB.

I want to install either the U1 unbranded de-bloated firmware or reinstall the TMB 950U firmware (since there is no ATT firmware for v3)

Also i believe this is the factory binary for v3 on the 950u COMBINATION_FA70_G950USQU3ARD1_CL13344735_QB17599041_REV00_user_mid_noship_MULTI_CERT.tar.md5

please let me know if i am wrong. I got it at androidfilehost.com. Sorry that I can't post the link yet because I am a new user.

I would like to know what these error messages mean. Also do I need to carrier switch or not to flash either U1 firmware or TMB firmware.

I been reading that using Cosmy Odin causes hard bricks with blv3 and also that that has been disproven. Just trying to get all info before I decide to do anything. Any help would be appreciated. Sorry for the long post
[Samsung Galaxy S8 Guides, News, & Discussion] np2fast:
Could you link me to the firmware you used?
[Samsung Galaxy S8 Guides, News, & Discussion] adityats2020:
The latest update has Bootloader v3. Running T-Mobile firmware G950USQU3CRD4. What unlocked firmware can I use over this?
[Samsung Galaxy S8 Guides, News, & Discussion] davidkwill:
G950U1UEU3CRD4 is the U1 firmware to use with the blv3. I just successfully flashed it on my t-mobile branded phone using ATT.
[Samsung Galaxy S8 Guides, News, & Discussion] Safy4u:
Hey everybody, i have unlocked at&t running on G950USQU2CRC5, somehow there is no bloatware, but i wanna convert it to Factory Unlocked U1, can i flash this G950U1UES3CRE2.

I already tried but i got abl.elf.lz4 erorr on Princecomsy Odin.

And sha error on v3.13.1 version of odin.
[Samsung Galaxy S8 Guides, News, & Discussion] t12icky0:
You need the 3.13.1B patched odin. I have it on my thread for the att/cricket in this forum or there is another guy who has it not a few threads down also.
[Samsung Galaxy S8 Guides, News, & Discussion] Safy4u:
yeah that`s right, i used it and guess what, it working :D

thanks dude :good:
[Samsung Galaxy S8 Guides, News, & Discussion] t12icky0:
No problem, glad you got it sorted out
[Samsung Galaxy S8 Guides, News, & Discussion] mrc3:
Hello, So I am in the situation having purchased a replacement S8 for my S8 which is on T-Mobile which has a few problems. The new S8 was a sprint S8 and flashed with Sprint Firmware. Both the purchaser and the Sprint representive say that the phone has been unlocked. but under system updates it still says "UICC Unlock" - Your device is locked to sprint SIM's only" So I am looking to solve this problem without Sprint's help.

So before I get my phone is completely borked up state, I wanted to verify some of the instructions on Page 1.

It is currently running G950USQ3SCRE2 software. Model SM-G950U, Hardware version: Rev 1.0

I have downloaded:

SM-G950USQ3CRE2 (for t-mobile) SM-G950U_1_20180508103140_4w0hupczzp_fac

Oden3_v3.13.13BPatcheD

Oden3+V12+(PrinceComsy)

Samsung Drivers and installed on computer.

Next I should follow steps to switch carriers so:

Step 5: Using the Oden3_v3.13.13BPatcheD version

Step 9: There is no file named or starts with Combination... Should I load each file type that was extracted from the firmware image individually into Oden? (Bl, AP, CP, CSC and USERDATA) or just the AP file from the firmware I downloaded, or something else?

Step 22: Should I still use Prince Comsy version of Oden for this step?

Thanks in advance, Mike.
[Samsung Galaxy S8 Guides, News, & Discussion] yammi79:
I can't answer the firmware question - you should pick the one that fits your carrier etc (which is described in this post) but I just switched my 950U from T-Mobile to completely unlocked (U1) and can answer some of your other questions:

Step 22: I use the patched Odin 3.13 B - worked fine for me (my bootloader was V2)

Step 9: you want all files. I flashed BI, AP, CP and CSC
[Samsung Galaxy S8 Guides, News, & Discussion] gm2racer:
Hey everyone, I flashed my Cricket S8 to the SM-G950U1 unlocked firmware when my phone was running Nougat. I have a friend who would like to flash his Cricket S8 the unlocked firmware too, but he has already upgraded to Oreo. Can anyone confirm that this still works with the Patched Odin 3.13.1 and CRE2?

Thanks!
[Samsung Galaxy S8 Guides, News, & Discussion] t12icky0:
I have a thread with the cre2 firmware and everything needed too get volte working on cricket (no Wi-Fi calling though). It's a little ways down in this forum. I have cricket also and i'm on cre2 myself.

But to answer you, yes it still works
[Samsung Galaxy S8 Guides, News, & Discussion] richsoucie:
anybody been able to change carrier with bl3
[Samsung Galaxy S8 Guides, News, & Discussion] ZuluAlpha:
Yes, it works fine with the instructions on page one. The one exception is that you need to use 3.13.1 patched Odin instead of PrinceCosmy.
[Samsung Galaxy S8 Guides, News, & Discussion] benevolent.spectator:
Bootloader v4?

I have baseband version G950USQU4CRE9. I believe that means I have bootloader v4. What changes do I need to make from the guide on the first page if I want to switch carriers (from VWZ to TMOB)?
[Samsung Galaxy S8 Guides, News, & Discussion] tritonofg:
Have you successfully done this?

I attempted this using a factory unlocked S8 (directly purchased from Samsung) on the G950U1UES3CRE2 FW using Odin 3.13.1 and Binary 2. I suspect we need Binary 3.

I get an error on the phone:

SW REV CHECK FAIL: [abl]Fused 3 > Binary 2

Odin Log:

<ID:0/003> Added!!

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<ID:0/003> Odin engine v(ID:3.1301)..

<ID:0/003> File analysis..

<ID:0/003> Total Binary size: 1985 M

<ID:0/003> SetupConnection..

<OSM> All threads completed. (succeed 0 / failed 1)
[Samsung Galaxy S8 Guides, News, & Discussion] ZuluAlpha:
It looks like you are trying to install a bootloader V2 firmware but the phone is already on 3. Grab a V3 firmware from fw.updato.com and see if that works. You can go up bootloader numbers but cannot go down.
[Samsung Galaxy S8 Guides, News, & Discussion] tritonofg:
Follow up

I do not see a link for the v3 binary - only a whole bunch of FWs (unlocked and carrier versions).

Did not find anything called "Factory Bootloader (v3) or Canadian HOME_CSC (Bootloader v3)
[Samsung Galaxy S8 Guides, News, & Discussion] anarasgarli:
1. Combination files v3. - https://androidfilehost.com/?fid=890278863836283758

2. Download this frimware for multi carrier csc - https://www.sammobile.com/firmwares/galaxy-s8/SM-G950W/XAC/download/G950WVLS3BRE1/220537/
[Samsung Galaxy S8 Guides, News, & Discussion] tritonofg:
Thanks! Having what I am sure is a noob issue though

Odin keeps on failing on me:

log:

<ID:0/003> Added!!

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<ID:0/003> Odin engine v(ID:3.1301)..

<ID:0/003> File analysis..

<ID:0/003> Total Binary size: 6752 M

<ID:0/003> SetupConnection..

<OSM> All threads completed. (succeed 0 / failed 1)

S8 screen:

Carrier: XAA

RPMB fuse blown

RPMB PROVISIONED

Current Binary: Samsung Official

System Status: Official

FRP LOCK: ON

Warranty Void: 0x0

Qualcomm Secureboot: Enable

RP SWREV: B3(1.1.1.1.1) K2 S3

Secure Download: Enable

Any ideas?
[Samsung Galaxy S8 Guides, News, & Discussion] tritonofg:
Was issue with Surface Pro 4. Worked great on another laptop.
[Samsung Galaxy S8 Guides, News, & Discussion] chetan180:
do i need to just flash combination file ..?

i flashed nothing happened it just boot back to system
[Samsung Galaxy S8 Guides, News, & Discussion] anarasgarli:
I changed download link, download from this: https://androidfilehost.com/?fid=890278863836283758

BIT 3
[Samsung Galaxy S8 Guides, News, & Discussion] hightech316:
Thanks for the extensive guide and links.

I have a SM-G955U . While in download mode, states Carrier: Sprint.

After reading your article , for me to flash to MetroPCS I would need to download the firmware for that carrier ( There is not MetroPCS firmware, So Im downloading T-mobile ) Flash the CSC after I flash Combination FIle. Then flash corresponding CSC code via ADB while , Right?

Has anyone switched their carrier to MetroPCS on the S8 ? In the past with other devices that did not have MetroPCS firmware , I've chosen T-Mobile .
[Samsung Galaxy S8 Guides, News, & Discussion] Master_W:
I’m trying to flash the unlocked firmware back to my unlocked model S8 after flashing the Verizon carrier firmware to it. Flashing the Verizon firmware went through just fine, but trying to flash the unlocked firmware gives a FAIL write error. If I try to flash it with a standard version of Odin (not Prince Comsy) it gives a SHA256 invalid error. I’ve tried downloading an older firmware file, multiple versions of Odin, and different PCs.

Any help would be appreciated.
[Samsung Galaxy S8 Guides, News, & Discussion] cellneuron:
Anyway to flash a bootloader V4 Tmobile s8 to unlocked firmware? I can not find any V4 or above unlocked rom to download. Thanks
[Samsung Galaxy S8 Guides, News, & Discussion] Master_W:
Been having a similar issue as well. The V4 bootloader isn’t available in a U1 firmware yet it seems. Here’s a Reddit post with an alternate method, but I’ve opted to just wait for a V4 U1 release, seems safer.

https://www.reddit.com/r/GalaxyS8/comments/8teads/comment/e186dcz?st=JJQ623SY&sh=9022c135
[Samsung Galaxy S8 Guides, News, & Discussion] strubedo:
The reason your getting the sha256 error is because Odin thinks is a mismatch of models you must use the patched Verizon.
[Samsung Galaxy S8 Guides, News, & Discussion] Master_W:
I’m assuming you meant to say patched version? Tried that but it gives a different error. Pretty sure I’ve figured out that it’s because the bootloader on the Verizon firmware is V4, while the unlocked firmware is still at V3.
[Samsung Galaxy S8 Guides, News, & Discussion] sperera97:
it works like a charm, thanx you sir...
[Samsung Galaxy S8 Guides, News, & Discussion] martinko23:
Hi,

i have a g950F (G950FXXU2CRED), does anyone know where i can find the combination files/factory binary for this bootloader ??

Thanks :)
[Samsung Galaxy S8 Guides, News, & Discussion] ImpheOtus:
Check this thread:

https://xdaforums.com/galaxy-s8/how-to/guide-changing-csc-s8-s8-root-t3799045

There are links on the OP to download the combination file you are looking for.
[Samsung Galaxy S8 Guides, News, & Discussion] _ChiroX:
You know if there is any for G950FXXU3CRGB - G950F ?
[Samsung Galaxy S8 Guides, News, & Discussion] ImpheOtus:
This is the only combination file with a bootloader v3 that I have been able to find:

https://easy-firmware.com/home/brow...727_QB18998288_REV00_user_mid_noship.tar.md5/

I believe that should work. But I'm not 100% sure.

Someone could confirm? Maybe [MENTION=2611059]yojosefo[/MENTION]
[Samsung Galaxy S8 Guides, News, & Discussion] yojosefo:
Looks good to me! Perhaps give it a shot, otherwise just re-flash the full stock firmware to go back to the previous state, I guess... :silly:
[Samsung Galaxy S8 Guides, News, & Discussion] C3cars:
It seems that I have baseband version 5.....anyone else with a version 5 baseband?
[Samsung Galaxy S8 Guides, News, & Discussion] rocket31337:
I'm also wondering this :(
[Samsung Galaxy S8 Guides, News, & Discussion] d0uble_v:
Same with me, I am on 5 and need to switch carrier.
[Samsung Galaxy S8 Guides, News, & Discussion] twizt3d:
I too am on BL5 trying to flash ATT, unfortunately I believe ATT FW is only leaked to BL3 so Im fairly positive this is impossible for me at the moment. The U1 FW seems to be on BL5 but from my basic searches, I cannot find any Leaked Universal carrier on 5 yet. Someone correct me if I am wrong, and I hope that I am....
[Samsung Galaxy S8 Guides, News, & Discussion] bradical711:
You are correct about the ATT leaks about BL 3 being highest (because it's the highest I've seen too on XDA) but you are wrong about the U1 firmware not being available to download for BL 5... Updato.com and sammobile.com are great sites for getting Samsung firmware. When I checked, which was minutes ago for you of course, I found U1 BL 5 firmware on updato, I didn't check sammobile but if updato has it, so does sammobile (probably, you can always check both sites). Anyways check the sites for the U1 firmware and flash in Cosmey(patched Odin) Odin 3.13.1 hope this helps! PS I'm also on ATT and that's why I refuse to update past BL 2 (that, root, and Partcyborgs ROM for the s8 is just too good that not having the latest updates doesn't bug me lol). Anyway, I wouldn't dare go above 3 for the sake of probably never being able to get official ATT firmware above BL 3 on XDA.
[Samsung Galaxy S8 Guides, News, & Discussion] d0uble_v:
hmmm. not able to find BL 5 on updato, if you dont mind can you share the screenshot?
[Samsung Galaxy S8 Guides, News, & Discussion] bradical711:
Here you go lol. It wasn't hard to find. Just search harder.? Lol I even got one for the U & U1. I haven't even checked sammobile yet either but if you guys for real can't find it I'll just start throwing links for every BL 5 firmware for ya if need be. Just send me a pm. Also make sure if you are flashing a firmware that didn't come with your device to use cosmey or modded Odin 3.13.1 Whatever you wanna call it..
[Samsung Galaxy S8 Guides, News, & Discussion] t12icky0:
By chance have you seen the new firmware(bl5) with any userdata file? I'm trying to find an updated userdata for att from the bl5 firmware.
[Samsung Galaxy S8 Guides, News, & Discussion] bradical711:
That, I have not seen yet. But I haven't done any super hard searching for it either. You might be able to find it somewhere I'm sure but I don't personally know of a place to get that from yet.
[Samsung Galaxy S8 Guides, News, & Discussion] jonnala:
Putting my question on top. Can I take OTA update of BL3 on BL2 unlocked firmware ?

Hi ,my phone is galaxy S8. I was successfully able to flash unlocked firmware (BL2) on T-Mobile (US) (BL1) successfully using carrier switch method and unlocked firmware methods in sequence. But I faced some couple of hiccups in that process

1st issue is when I tried to use BL2 factory binary on tmobile BL1 and got an issue stuck in factory binary screen. So I reflashed with BL2 stock tmobile firmware using standard method first and then continued to carrier switch method followed by carrier unlock method.

2nd issue is when I tried to use prince cosmy version of Odin . It was solved when I switched to patched version of odin.

Overall like I mentioned, now I am on SM-G950U1 BL2 from SM-G950U BL1 tmobile.

Now the question is, I got OTA update for BL3. Wondering if I can take it or I should redo the process starting with flashing tmobile firmware BL3 using standard method , carrier switch method with BL3 and then unlocked firmware method with BL3.

There is another thread on XDA mentioning not to take OTA but finally pointing to this thread that it is not the case . Appreaciate any advices. Btw my download screen still shows carrier :TMB although my phone has unlocked firmware. Not sure if that is expected or I am did something wrong in the sequence .
[Samsung Galaxy S8 Guides, News, & Discussion] Charkatak:
I followed this guide when I had an unlocked S8 and kind of made it T-Mobile: TMB/TMB/XAA - which was sufficient and it worked properly.

Now I have Sprint S8 Active and it is already at XAA/XAA/SPR - is there a way to make it TMB instead of SPR? The interesting thing is that I have tried to flash TMO firmware using latest Odin, but upon completion, the software info still shows XAA/XAA/SPR, as if I haven't flashed. I expected it to be at least: TMB/TMB/SPR. At the moment recovery shows "support for single csc"

Could it be that I needed to flash USERDATA file as well?

I have attached a file, I don't know why, but under "Service Provider SW ver." G950U is shown. Should it be like that?
[Samsung Galaxy S8 Guides, News, & Discussion] MalharB:
When I extract firmware to get USERDATA file , it has extension userdata.img.ext4 and is not recognized by odin and I changed ext to tad.md5 still not recognized by odin. How do I make it odin recognisable to be flashed via odin UMS.

Thanks
[Samsung Galaxy S8 Guides, News, & Discussion] Barduous:
Hello, I want to follow this guide to switch my Unlocked S8 to the AT&T firmware. I've read the guide very thoroughly, however my phone seems to be on Baseband: g950u1ueu5crh3. Which I believe corresponds to a bootloader version 5. Will this require significant deviation from the provided guide? Or am I unable to follow this guide at all due having neither the v1 nor v2 versions of the bootloader?

I appreciate the time and attention to detail that went into this guide. Thank you for any help offered.
[Samsung Galaxy S8 Guides, News, & Discussion] The_Big_H:
I want to do the same exact thing. I also have the 950U1 and want to flash the ATT firmware in hopes of getting VoLTE and wifi calling. I believe if you flash bootloader 5 firmware on a phone with that is already bootloader 5 it will be ok but I have not received a good answer on other posts. I will be following this thread closely hoping for a definitive response.
[Samsung Galaxy S8 Guides, News, & Discussion] jonnala:
I think the process should be same . But the challenge is getting hold of correct version of factory binary and ATT firmware files which are BL5.

---------- Post added at 10:02 AM ---------- Previous post was at 09:57 AM ----------

Answering my own question. Took a risk of taking OTA for BL3 and it worked :).

That boosted my confidence level took 4-5 more OTA updates

And now I am on BL5 August patch. No issues so far and everything good
[Samsung Galaxy S8 Guides, News, & Discussion] alirz:
So does this mean I can flash back to my original Canadian fw on s8+ which I had converted to u1/XAA fw back in March? It’s currently on the latest September patch which BL5.

Do I use the old factory bin and the home CSC from the new/latest Canadian fw? Thanks.
[Samsung Galaxy S8 Guides, News, & Discussion] alirz:
Anyone? Can the guide still be followed if on bootloader 5? Is there a new factory binary to use?
[Samsung Galaxy S8 Guides, News, & Discussion] zwolf4444:
If I have the unlocked US version (950U1) on stock current firmware (BL5) is there anything stopping me from just straight flashing the Cricket/AT&T 950U firmware? Do I necessarily need to flash combination firmware first? Is there any way to flash either without wiping data?
[Samsung Galaxy S8 Guides, News, & Discussion] zwolf4444:
Were you able to succesfully do this? Looking to do the same.