yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8 Guides, News, & Discussion] Skandrae:
I'm having problems with this.

I can't get past Step 8.

I've tried modded and unmodded Odin, and it either tells me there's a mismatch or it just goes to SetupConnection, then says Complete(Write) operation failed.

I have a US ATT S8 that I unlocked and I'm trying to get to work on Sprint and I've been at this for hours.

Any tips?
[Samsung Galaxy S8 Guides, News, & Discussion] rlsyoung:
Can someone please list the steps for flashing Verizon software on ATT S8? I do not want to use the unlocked software (need mobile hospot to work).
[Samsung Galaxy S8 Guides, News, & Discussion] :
All firmware is the same. Device needs to be sim unlocked and use Odin to flash it. If Odin doesn't work use the PrinceComsy/modded Odin. If you own G955U then any firmware that starts with G955U can ba flashed. It won't matter because the sim sdcard will require a network reboot and everything will be to the company your sim is from. Meaning like my situation, T-Mobile G955U and I have ATT as my carrier, I flashed Verizon,Tmobile, and ATT and everything is still ATT once booted. If you want the original phones options on the phone,

1.Take out your sim card,

2.Flash firmware BL,AP,CP,CSC. Leave F. Reset and Auto Reboot ticked,

3.then once rebooted into homescreen, put your sim card in,

4. Once sim is in, network/carrier reboot will happen just let it do its thing,

5. Now this is where you decide if you want to keep it this way or redo it and leave sim card in while flashing.

In your settings you will have double of hotspot, device maintenance, software update,etc. It looks a BIG MESS, but hey if you want carrier features of original phone company and your sim card carrier you have best of both it's just a mess. Use Odin 3.12.5 or 3.12.7
[Samsung Galaxy S8 Guides, News, & Discussion] MMarshall2018:
I have a ATT G955U (S8+) and want to switch it to Verizon. I thought i read where the plus don't work(towards the start of this forum). Can someone confirm weather it does or doesn't work on the plus?
[Samsung Galaxy S8 Guides, News, & Discussion] JeffATL:
I now can't get my ATT sim work after using a SPrint sim, flashed BQK5 TO ZQKS was on XAA, first Sprint swithced back and forth and worked, but now it seems like Sprint fully took over phone converted to SPR. When I take out the SPrint sim , the ATT sim no longer runs autopreconfig and can't place calls in the Sprint firmware
[Samsung Galaxy S8 Guides, News, & Discussion] lewbrah:
Flashing question

Hi all,

So I've read through this entire thread and I'm just looking to get some clarity. I've seen this question asked a few times but no responses to it so please forgive me if i missed the reply in the 70+ pages of this thread.

I have an unlocked Verizon gs8 but I switched my carrier to AT&T so I have an AT&T Sim card running on the Verizon firmware. My question is do i really need to do all 25+ steps to switch the firmware from Verizon to AT&T or can I flash the latest AT&T firmware (SM-G950U1) found on Updato similar to what podagee mentioned in his post a few earlier and be good to do. I admittedly don't understand everything here but it seems odd that I'd have to flash to the Canadian firmware only to then flash again to the AT&T firmware.

Any explanation would be great as to the steps I need to take to go from my verizon firmware to AT&T.

Thanks!
[Samsung Galaxy S8 Guides, News, & Discussion] meetvora1998:
I m in india can i unlock it???
[Samsung Galaxy S8 Guides, News, & Discussion] bxcovi:
So i have a vzw s8+ with a tmobile simcard, do i have to do the carrier switch steps? or can i just flash the 955u1 firmware? can someone explain to me what the carrier switch is used primarly for?
[Samsung Galaxy S8 Guides, News, & Discussion] juvemex:
thisone is sprint carrier switch works :

dream2qltesq:/ $ ls -la /efs/imei/

total 40

drwxrwxr-x 2 root radio 4096 2016-12-31 16:00 .

drwxrwx--x 22 radio system 4096 2017-01-25 01:23 ..

-rw-r--r-- 1 radio system 0 2016-12-31 16:00 firstBoot

-rwxrwxrwx 1 radio system 4 2017-05-22 18:41 mps_code.dat

-rwxrwxrwx 1 radio system 3 2017-05-07 17:43 omcnw_code.dat

-rwxrwxr-x 1 radio radio 14 2016-12-31 21:02 prodcode.dat

dream2qltesq:/ $ ls /efs/imei/

firstBoot mps_code.dat omcnw_code.dat prodcode.dat
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
This is the T-Mobile one.

dreamqltesq:/ $ ls -la /efs/imei/

total 40

drwxrwxr-x 2 root radio 4096 2017-03-03 10:53 .

drwxrwx--x 22 radio system 4096 2017-02-27 07:19 ..

-rw-rw-r-- 1 radio system 3 2017-05-22 22:17 mps_code.dat

-rw-rw-r-- 1 radio system 3 2017-03-03 10:53 omcnw_code.dat

-rwxrwxr-x 1 radio radio 14 2016-12-31 16:00 prodcode.dat
[Samsung Galaxy S8 Guides, News, & Discussion] juvemex:
this is the one i get that error:

dream2qltecan:/ $ ls /efs/imei/

mps_code.dat omcnw_code.dat prodcode.dat salesCodeChanged

dream2qltecan:/ $ ls -la /efs/imei/

total 40

drwxrwxr-x 2 root radio 4096 2017-01-29 18:43 .

drwxrwx--x 22 radio system 4096 2017-01-20 07:31 ..

-rw-rw-r-- 1 radio system 3 2016-12-31 19:00 mps_code.dat

-rw-rw-r-- 1 radio system 3 2017-01-29 18:43 omcnw_code.dat

-rwxrwxr-x 1 radio radio 14 2016-12-31 19:26 prodcode.dat

-rw------- 1 system system 0 2017-05-16 00:50 salesCodeChanged
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
I see now. You have read/write perms on the system partition. I think I can fix this. NVM.
[Samsung Galaxy S8 Guides, News, & Discussion] juvemex:
tell me ill try right now
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
Try echo "XAA" > /efs/imei/omcnw_code.dat"
[Samsung Galaxy S8 Guides, News, & Discussion] juvemex:
could it be that when on sprint and it activates since it has to install all sprint bloatware and logo it gives perms to this files (glitch) ?
[Samsung Galaxy S8 Guides, News, & Discussion] juvemex:
what about product_code?
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
I have a T-Mobile s8+ stock ready for testing just let me know what files and I downloaded the stock at&t and TMobile as backup so I have the files
[Samsung Galaxy S8 Guides, News, & Discussion] baophucdinh31:
stupid question, but what is this for? like the benefit of switching carrier? does this help with the unlock?
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
to get full carrier features like VoLTE, SMS working etc...or even better we can go to XAA to get fully working unlocked phone without any bloatware

---------- Post added at 12:19 AM ---------- Previous post was at 12:03 AM ----------

i would start with flashing the eng boot and see if you have write permission to the mps_code.dat file. None of us do....except for one other user with the original sprint phone.
[Samsung Galaxy S8 Guides, News, & Discussion] jellomonster54994:
i dont have g955u eng boot file only the g950u was posted
[Samsung Galaxy S8 Guides, News, & Discussion] mweinbach:
This only works on sprint. UGH.
[Samsung Galaxy S8 Guides, News, & Discussion] Ph3n0x:
This also works on verizon make sure you flash under ap with nothing else was able to go from xaa/xaa/vzw to vzw/xaa/vzw to vzw/vzw/vzw was also able to put tfn on as well and the tracfone logo came up:D
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
So was your phone originally xaa ? I just don't get how certain configuration allow you to have write permission on the file.
[Samsung Galaxy S8 Guides, News, & Discussion] Ph3n0x:
nope was originally verizon i will tell you how i did it when i get home what i did to start was flash the factory image went to the dialer ime i think its called and dial *#243203855# and selected xaa it was a pain to get back to stock verizon tho
[Samsung Galaxy S8 Guides, News, & Discussion] Rushstrike:
ok. Please also mention which firmware version your'e using like D9,DE,DF . Thank you.
[Samsung Galaxy S8 Guides, News, & Discussion] Ph3n0x:
my original firmware was D9 I flashed COMBINATION_FA70_G955USQU1AQD8_CL11249373_QB13326524_REV00_user_mid_noship_MULTI_CERT.tar.md5

after that booted I went to ime and dialed *#243203855# from there you can chose your carrier from there att sprint boost whatever and xaa I chose XAA but that made me lose verizon bands not sure why. after that I did factory reset and went back to xaa/xaa/vzw then after the phone booted I just put it into download mode right away and flashed eENG_ROOT_G955U.tar.tar and was able to use the commands from above. also my se for android status was permissive
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
not sure but somehow you are getting rw access to system whereas no one else is haha, u are lucky lol
[Samsung Galaxy S8 Guides, News, & Discussion] elliwigy:
i actually take that back.. efs, persist and persdata partitions we have write access to.. so makes sense to have access in efs to change the code
[Samsung Galaxy S8 Guides, News, & Discussion] CHSDave:
Super Lost

I'm super lost and any help would be greatly appreciated. I have a Verizon s8+, and I'm using it on my Sprint account, talk/text works fine but no data?? I'm try to unlock it or change the Carrier to sprint but these instructions aren't clear to a novice like myself. I've spent about 5 hours on this and I might be going insane. Can anyone post clearer steps? I don't understand what EXACTLY I need to download. I have ODIN, I have 10 million different files from the links, but I'm not sure when/which one to use.
[Samsung Galaxy S8 Guides, News, & Discussion] smithmunki:
Sorry for the dumb question here

So do this unlock my sprint s8+ so i can use it on tmobile??
[Samsung Galaxy S8 Guides, News, & Discussion] DevalB:
I'm not sure if people have seen, but the latest firmware build for the S8/S8+ now allow for seamless carrier switching as long as the SIM slot is unlocked for domestic or international use. The device now is truly a single SKU device which works on all carriers without the need to flash any special files.
[Samsung Galaxy S8 Guides, News, & Discussion] lewbrah:
verizon to att

So after i saw uwapalwa post a reply saying i didn't have to do all of those other steps, I did the following and my phone is working like a charm on the g950u1 firmware. I first flashed the Home_CSC file and the phone rebooted then i went back into download mode and flashed the g950u1 firmware with prince comey odin. It passed and the phone rebooted a few times and bam, now off of Verizon firmware. would be willing to go into more detail if needed for anyone.
[Samsung Galaxy S8 Guides, News, & Discussion] lewbrah:
To follow-up on this, i realized that i wouldn't have VOLTE with that version so I used Odin to flash the G950USQU2BQK5 version (found here: http://updato.com/firmware-archive-select-model?record=0C70C888DEB811E7A5F9FA163EE8F90B) Since i have an ATT sim card, it installed the ATT variant even though it says Verizon on Updato (its all the same firmware). Now I'm able to have LTE while on the phone as well as WiFi calling and all of the other carrier specific features.
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
Apologies if mentioned.. but do these steps work with the 950U1 S8 on US based ATT to enable volte/hd calling (and subsequently numbersync) on the phone.. i've read it wont work overall? And if it does, do these steps involve wiping the phone?

Perhaps a clue in the last post?:
[Samsung Galaxy S8 Guides, News, & Discussion] lewbrah:
Yes, I have volte/hd calling after applying the ATT firmware I linked in the post you quoted. Also, yes my phone wiped so be sure to backup your phone bf you do it.
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
Does it add the hd bloatware.. i assume its worked for some time and hasnt been disabled from the att side yet?

You said LTE was added, at least with my USA ATT and 950U1 i have LTE and great speeds (70 to 127Mbps).. this wasnt working for you by default prior?
[Samsung Galaxy S8 Guides, News, & Discussion] lewbrah:
What I meant from adding LTE was when I was on 950U1 and I made a call, the phone defaults back to 3G but once I switched to the ATT firmware, it now stays on 4G when on a call since it's now using volte as it should.
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
Ah i see.. i hadnt realized it did that.. just tried it.. the phone drops to H+ on mine.

Does the phone show verizon at the top or on booting as a result of using a Verizon firmware?

Which exact steps did you follow.. the ones at the start of the thread plus the link to the vzw firmware?

---------- Post added at 02:53 PM ---------- Previous post was at 02:51 PM ----------

Also.. i wonder what the difference between that firmware and the one located here would be? edit: i guess thats for the s8 plus not the s8 as with mine.

This one says ATT specific:

https://www.gizrom.com/g950usqu2bqk5-for-galaxy-s8-plus-att-firmware/

or maybe its this one:

http://updato.com/firmware-archive-select-model?record=6D8D42A9EC0F11E7A5F9FA163EE8F90B (G950U1UES2AQL1 and att and says s8) had this one been tested and shown to not add volte i assume? (dated dec 27th)

actually the vzw one you linked has csc code G950USQU2BQK5.. this att one i found is a different csc.. my about on my phone says build G950U1Ues2AQL1.. i would think it would have to be this csc (which is listed as G950U1OYM2AQL1) or it wont work
[Samsung Galaxy S8 Guides, News, & Discussion] lewbrah:
No, it shows ATT as expected. All of the 9550u firmware is the same, your sim card determines what carrier is installed. The firmware version I posted a link to says Verizon but installed as ATT bc I have an ATT sim card.

You don't need to do all of those steps. I flashed the Home_CSC file first and let the phone reboot. Then I went back into download mode and flashed everything else in the firmware. The phone will reboot a couple times then the ATT symbol pops up. Once it was done, I updated via OTA to the most recent firmware.

If I remember correctly, I used regular Odin for the Home_csc and prince comey Odin for the 2nd flash but I could have that flipped. It will says mismatch error if it doesn't like it so just use the other if it does.

All in all it took about 20 mins for the whole process to go through.
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
But the build number on my phone doesnt match up with the link you referenced.. doesnt that matter (i'm new to the flashing process so its vague to me).. thats why i asked about the build one that matches that i did find (att one).. Or did your build number change on the phone after wards anyway

In terms of steps.. is it basically identical to the first post.. like..

1. Download Factory Binary, EngBoot, and the G950W firmware. (i dont think engboot is needed i did it without eng boot and works)

2. Turn off phone

3. Hold down on Bixby button + power + volume down

4. open Odin v3.12.7

etc.. but wouldnt G950W be the link of the vzw in this case (or the att one i found)? Is that the spot for the file?

These steps also show using a "factory" binary or similar (in addition?)

Worried about bricking the phone.. i also assume this will lose the factory unlock status?
[Samsung Galaxy S8 Guides, News, & Discussion] lewbrah:
Build number gets updated after the flash, I'm on QL1 build now after the OTA update.

You don't need to do anything with the binary stuff. My assumption this was done back bf the carrier firmware was available and the instructions just haven't been updated since.

This does not affect device status (stays official).

Lastly, the nice thing about Odin is even if you happen to brick your phone, it's easy to reflash the stock firmware to get unbricked, chances are slim anyhow.
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
by not affect status, you mean it should stay unlocked but just have att carrier bloatware?

So it sounds like i should indeed maybe try the verizon flash ..

i'd still love to narrow down the exact steps with links to the software ideally, but.. i spotted this..

edit: i assume leaving the att sim card in there the whole time is ok as well?

1)Download the official firmware for your model

2) Boot into download mode by pressing ( power + volume down + Bixby button) and stop at the screen of continue and reboot.

Press volume down to restart phone

Quickly boot back into download mode by pressing (power + volume down + Bixby button)

Press continue

Congratulations fully working now

3) Install firmware with Odin (this would be the verizon firmware?)

4) Wait for the firmware to be installed

5)Ready)))

No adb or XAC or XAA commands referenced prior just odin software? No 950W firmware? is the engboot also something to do with binary that is no longer needed?

Might be as simple as posted b4?:

1.Download firmware u want (the vzw 950u1 linked)

2. Download odin prince comsey (no adb? or with adb launch, unclear so far)

3. Flash (through odin)

Phone remains unlocked but has ATT bloatware (and suddenly hd voice ? without contacting att to turn it on)

is this the correct odin?
[Samsung Galaxy S8 Guides, News, & Discussion] lewbrah:
the status i was referring to is the device status under the settings to show that it wasn't a custom rom basically it doesn't trigger Knox

Yes leave the att sim in

Correct no adb commands or anything, no need for 950W firmware and engboot is not needed either

I flashed the HOME_CSC file first then i went back into download mode and flashed everything else with regular CSC file the next time....Correct ATT bloatware is now installed with hd voice and VOLTE

yep, thats the correct Odin plus google for the prince comsy odin 3.12 as well
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
Just a few final questions, i think i understand now thanks for the help..

When you said flash the Home_CSC portion.. i assume thats a file in the zip file ill download (the vzw 3.6 gb file).. same thing for the non home right? It sounds as if i enter download mode via the phone for this part, let it do its thing, reboot phone then do the non home (or no reboot maybe).. then when done it should install and boot up.

Do i need samsung usb drivers or similar, or just launch in admin mode odin and go for it?

Im seeing 3.12.7 is a newer non modded one, i guess maybe i should use that.. i found 3.12 modded as well (dont see .7)..

On the vzw firmware.. the updato site is horribly slow.. says it will take a day to download.. so did the sammobile site.. is there an alternative here to avoid waiting a day :)
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
Some questions on the odin app itself.. it seems to have a bunch of entries.. which did you have to put something for (obviously CSC or home csc).. Want to make sure, hoping to not screw things up. (not sure how you go back to factory if you do).

Then there are secondary options here

I assume the BL is the BL_G950~~~.md5 file, same with the AP, and CP file..

The regular CSC being the one without home too?

but what about userdata, do i not need that portion of the zip file?

I also read to use USB 2.0 ports not 3.0.. is this true as well.. the laptop i was going to use, i dont think has usb 2.0 anymore.
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
Anyone have any input on the portions of the odin that need filled in?
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
ok i gave this a shot..

So i did the odin regular first.. i didnt check off and add anything except for HOME_CSC.. Phone reboots.. nothing wiped.. do see ATT symbol now..

Then i went to download mode again.. i checked each box, for bl, ap etc and regular CSC, hit start

Phone reboots after awhile.. NOTHING WAS WIPED.. (all my software still as was)

So.. i thought this should have wiped the phone, but it doesnt seem to have done so? When i make a call, i see 4G listed now..(i think this means HD voice is enabled.. or how do i know for sure).. if i try to enable wifi calling it pops up with oops, contact att etc.

When i attempt to enable number sync, i still get the oops error page on the phone (but i may need to call them to reactivate on their end as well)

Update: so i thought numbersync was working, as it did take the code finally, but in my tests its not.. which is also probably why callerid is still botched.. so i need to contact att yet again.
[Samsung Galaxy S8 Guides, News, & Discussion] ...Ali...:
Does this method need root?
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
Update here.. i managed to get everything working by going with a new sim card.. wifi calling works now.. and i was able to complete numbersync setup.. the only remaining issue i have is that my callerid seems to be blocked on the receiving end.
[Samsung Galaxy S8 Guides, News, & Discussion] awadh730:
i do the same, after that it show my network name but without network bridge/signal
[Samsung Galaxy S8 Guides, News, & Discussion] oponewbie:
Does anyone know if this will work with the SM-G892U phones to go back and forth between Sprint/Tmobile and maybe even AT&T and Verizon?
[Samsung Galaxy S8 Guides, News, & Discussion] ACardAttack:
Is this for snapdragon or exnoys? Can I flash the tmobile firmware onto a G950F? I've searched, but can't find a straight answer

Thanks
[Samsung Galaxy S8 Guides, News, & Discussion] markm75:
well 5 chat people later they finally fixed the unknown callerid issue.. apparently there is an internal back end feature for numbersync regarding it set to active and on.. both toggles were on.. the rep removed the "on" and now my callerid shows my number when calling from my phone (and from the watch when watch is in solo mode too).. everything works!:laugh:
[Samsung Galaxy S8 Guides, News, & Discussion] tonsa:
Xaa, xaa, att
[Samsung Galaxy S8 Guides, News, & Discussion] blessedsword:
Does anyone try with S8 Active (ATT)?

I don't want to get root, i just want to switch to T-mobile then I can get the friendly software update forever.
[Samsung Galaxy S8 Guides, News, & Discussion] nlandas:
I believe that I am in the same boat RE: Gear S3 frontier and S8 US Unlocked

I purchased an unlocked S8 from Best Buy only to find that AT&T doesn't play nice with them. I have all of the G950U1 files on the phone (the latest being G950U1UES2AQL1). I also have a Gear S3 frontier that won't NumberSync. I am now seeking clarification from you, if you don't mind, about specific steps you took.

First: Did you use Regular Odin to put the VZW Home_CSC onto your phone? And putting Verizon's Home_CSC caused the phone to show the AT&T logo even before flashing the other files?

Second: Did you use the Prince Comsy Odin the second time through to load the other files (were those the files for AT&T S8 - G950U - like here https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiDn932vPzYAhUCxmMKHcPGC-QQFggxMAA&url=https%3A%2F%2Fxdaforums.com%2Fatt-galaxy-s8%2Fhow-to%2Fatt-s8-stock-odin-files-firmware-t3730893&usg=AOvVaw0K3X8QzicbzA1QXE_S4Jxt?

Third: Did this give you the HD Voice feature necessary for NumberSync to work on the Gear S3 frontier smartwatch?

Fourth: Next you got a new SIM card to re-enbale WIFI calling.

Fifth: You had AT&T tech services disable a feature on its side having to do with toggling from "on" to "off" status for the NumberSync feature to correct the Caller ID feature not appearing when using the phone/watch.

Does that sound correct? I am ready to take the plunge and enjoy these features. It really shouldn't be this problematic. AT&T says BYOD but punishes you for doing so...:mad:

Thank you!