yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S8+ Guides, News, & Discussion] tonsa:
xaa

How do I switch to xaa? I flash my s8+ that is unlock by T-Mobile with SM-G955U1_1_20171212130814_j00kpxxwoj_fac.zip. It's the latest version. I tried it with the T-Mobile sim card and without any sim card I still get product code SM-G955UZATMB, firmware cs code TMB and active cs code TMB. Anyway to get XAA?

Thanks
[Samsung Galaxy S8+ Guides, News, & Discussion] Ganibal_Lector:
I have a Verizon version. Its GSM module is not locked from the beginning. Carrier switch doesn't unlock the phone. If it is locked you have to contact T-Mobile for unlock or use 3rd parties unlock service from E-bay etc. I did carrier switch without SIM card inside. Did you followed the carrier switching procedure with a Home_CSC from Canadian firmware as described on 1st page? If yours phone was unlocked before there should be no any problems. After carrier switch I got SM-G955UZKAXAA. I used the same firmware as you. However in Bootloader (volume down + Bixby + Power) I still have VZW (Verizon). But that is all what left from Verizon and it doesn't affect the phone in any way (I don't use any US carrier).

As well I read somewhere in this thread that since last Update Samsung uses automatic switch to yours carrier as soon as SIM card is inside even you flashed it as XAA. So try to flash it XAA and don't put any SIM card inside before you check the CSC.

However even your carrier is set to TMB you should not get any carrier bloat as you used U1 firmware.
[Samsung Galaxy S8+ Guides, News, & Discussion] tonsa:
T-Mobile unlocked my s8+. I tried without the sim card it still say TMB. I guess the latest update will automatically switch to what ever sim you put. I tried putting my ATT sim and when I looked at the csc it said ATT then I tried the TMB sim the CSC then went to TMB.

Thanks
[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] Mike15678:
1) Oh, this seems quite troubling. I’ll try to communicate this through both of my guides by tomorrow.

2) And by “bricking”, a user can’t even access Download Mode?

3) Also, if a user is on a different model number than the original model number they were on, they will brick, correct, if they decide to update to a firmware with bootloader v3?
[Samsung Galaxy S8+ Guides, News, & Discussion] Mr. Orange 645:
From what I understand, you CAN get back into download mode, and it will flash the correct firmware, but will reboot into the emergency download mode, and not even the smart switch emergency utility will fix it.

Yes, if they aren't the proper firmware then they update to Blv3, it will brick.
[Samsung Galaxy S8+ Guides, News, & Discussion] Mike15678:
What do you mean by “it will flash the correct firmware”? How could Download Mode do that?
[Samsung Galaxy S8+ Guides, News, & Discussion] Mr. Orange 645:
You can get to download mode and flash with ODIN, but it won't fix it.
[Samsung Galaxy S8+ Guides, News, & Discussion] Mike15678:
Have the bricked users tried ticking “Re-partition” and “NAND Erase” in Odin’s options (once they’ve supplied appropriate firmware, of course)?

Is there any way I can get in contact with them? Such as through a Telegram group, for example.
[Samsung Galaxy S8+ Guides, News, & Discussion] Mr. Orange 645:
Telegram is where this info is coming from. Once I get more info I'll post it. I started a new thread in the Note 8 forums. I'll post it there. Just wanted it in this info out in all the carrier switching threads.

Again, S8+ isn't affected YET, but I suspect their bootloader will bump to v3 eventually.
[Samsung Galaxy S8+ Guides, News, & Discussion] Mike15678:
Yes, I would predict that to happen soon, as well.

Anyways, thank you for this valuable information.
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
So a Xfinity 955u(cct) Flashed to an USA unlocked firmware 955u(usc) would be considered out of region?
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
No it's flashing a unlocked model firmware or a g955f, g955fd etc.
[Samsung Galaxy S8+ Guides, News, & Discussion] djteotancolis:
I have a Sprint S8+ that i changed the CSC to XAA and flashed the unlocked firmware...So i should flash it back to Sprint or can i flash AT&T firmware on it as i use AT&T service and some international sims when travelling abroad.
[Samsung Galaxy S8+ Guides, News, & Discussion] Mr. Orange 645:
Flashing ATT firmware will be fine. Again, as long as you are flashing carrier firmware on a carrier device. G955U firmware, not unlocked G955U1 firmware.

And with the new firmware versions, they are multi-CSC. Meaning no matter which carrier firmware you have installed, it will convert to whichever carrier SIM you have.

For example, I have a VZW Note 8, so my CSC codes are VZW/VZW/VZW (Network code/Sales code/Hardware code). Without flashing any other firmware, when I place my T-Mobile SIM in the phone, it detects the carrier, provisions the SIM, and tells you reboot the phone. When the phone reboots, not only does it change the Network code to TMB (optimizing the radio bands for T-Mobile), but it will also change the Sales code to TMB (Adding T-Mobile specific features).

So the Verizon boot animation will be replaced with the T-Mobile boot animation. Verizon apps will be gone, and you have T-Mobile apps. You'll have VOLTE, WiFi calling, etc. And your CSC codes will now be TMB/TMB/VZW (The hardware code never changes).

So if your flashing back to carrier firmware, just flash firmware for whichever carrier you plan on using. Then if you ever switch SIMS to another carrier, it will automatically convert to that carrier.

The U1 firmware was the only exception. It will change the network code, but not the sales code so it remains "bloat free." But starting with Blv3, you can no longer run U1 firmware on a carriwr device or carriwr firmware on a U1 device.
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
I was at the latest december bootloader xfinity firmware but when I put my MetroPCS Sim in it did not take the Xfinity voicemail app away and I couldn't delete it. So the 955u (usc) would be okay to flash over the Xfinity firmware? I'm not really sure what the United States firmware is for, is that the unlocked Best Buy version of the Galaxy S8 Plus?
[Samsung Galaxy S8+ Guides, News, & Discussion] Mr. Orange 645:
Yes you can flash another carriers firmware.

What do you mean by United States firmware?
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
Updato has it.Here it is. Should I flash it with the comsy Odin? do I need to do the carrier switch?

Galaxy S8+SM-G955U 7.0* DECEMBER 21, 17 USA (USC)G955USQU2BQK5
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
Is this a carrier model? Is it safe to flash it if the bootloader goes to version 3 and my original carrier was Xfinity?
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
If it says G955U then yes if it says G955U1 then no.
[Samsung Galaxy S8+ Guides, News, & Discussion] eddyo1993:
I keep running into an issue where it says thread succeeded (Success 0/ Fail 1) I have USB debugging on and using Odin provided within this post.
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
What are you trying to flash and what Odin. Comsey or normal odin?
[Samsung Galaxy S8+ Guides, News, & Discussion] eddyo1993:
Normal Odin I am trying to do the carrier switch.
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
What firmware
[Samsung Galaxy S8+ Guides, News, & Discussion] eddyo1993:
This is what i get exactly.

<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:0/005> Added!!

<ID:0/005> Odin engine v(ID:3.1207)..

<ID:0/005> File analysis..

<ID:0/005> SetupConnection..

<OSM> All threads completed. (succeed 0 / failed 1)
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
I'm on s2aql1 and this one is u2bqk5. Will flashing with comsy work since this is a u2 bootloader?
[Samsung Galaxy S8+ Guides, News, & Discussion] eddyo1993:
I think it's the factory firmware that says combination
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
Flash in normal odin not comsy
[Samsung Galaxy S8+ Guides, News, & Discussion] eddyo1993:
Yes that's the one I'm using as instructed on the post. I enabled USB debugging and disabled secure start up still nothing.
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
Ok, I reflashed the latest tmobile firmware not usc(US cellular) with regular Odin and now I get xaa/xaa/cct and now I lost wifi calling and volte. I figured i would get it since it is tmobile . Is there not a 955u version of TMK? I got a funny feeling there is no sales code for MetroPCS and it defaults to xaa. If I seem to remember, even on the cct firmware with the MetroPCS sim it also said xaa/xaa/cct. Any ideas to get a hybrid 955u1 tmk and a 955u TMK firmware which would have tmk 955u1 features?
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
I flashed the latest tmobile bql1 firmware on my xfinity phone but when it is finished flashing and it says "pass" the phone reboots and goes to a green android saying something about updating. It gets to 32% and errors out and then goes to stock recovery. If I reboot it goes into android just fine. Is this normal? Do I need to do a carrier switch or should the sim being inserted be enough?? In about phone I get xaa/xaa/cct. Shouldn't I get tmk/tmb/cct since I have a metropcs sim in?
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
Normal just reboot.
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
Can I mix and match 955u1 tmk csc to 955u firmware in odin to try to gain some carrier features for tmk(metropcs) like volte or wifi calling or will that be an upgrade no-no and end up in a brick? If I flash tmobile 955u I lose volte and wifi calling but flashing 955u1 tmk(metropcs) brings it back. Or will mixing and matching csc cause an error? So an unlocked carrier firmware u1 flashed on original locked carrier phone will brick it on v3 bootloader?
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
Does the latest firmware do all the carrier switching automatically with the SIM cards or do you still have to manually change your carrier over to what your sim is? I'm getting xaa/xaa/cct after flashing the latest T-Mobile firmware and I thought the latest firmware would have switched my active carrier. Do I need to perform the carrier switch still?
[Samsung Galaxy S8+ Guides, News, & Discussion] acheney1990:
So if I want to just go back to the Bell Nougat software that's official for me phone here in Canada, what are the steps?
[Samsung Galaxy S8+ Guides, News, & Discussion] Mr. Orange 645:
Update from [MENTION=7277512]mweinbach[/MENTION]:

"EDIT: After being tested by XDA Senior member me2151, it turns out cross region flashing does work. Prince Comsy Odin is working, but we can not test if the factory binary flashing will hard brick your phone. So flashing US unlocked onto a US carrier device should work."

To expand a bit on what [MENTION=7277512]mweinbach[/MENTION]*just said, [MENTION=4591212]me2151[/MENTION]*did some more testing, and he was able to successfully carrier switch from a 950U to 950W using Comsey ODIN. So it looks like Comsey ODIN is not patched as we originally thought. Not sure exactly what caused the tester's phone to brick, but it HARD BRICKED and had to be RMA'd at his expense. So we jumped on the forums here to warn others until more testing could be done. [MENTION=7277512]mweinbach[/MENTION]*wrote the article and [MENTION=7820902]xdanilva[/MENTION]and I began posting here.*

We may have overreacted, but wanted to err on the side of caution to protect people from hard bricks.*

The Blv3 factory binary has not been tested, so still unsure if/how we will be able to use it, or if it will cause issues.*

For now, carry on as usual, but understand we still don't know the full implications of the Blv3 patches. One person has already HARD BRICKED, and [MENTION=4591212]me2151[/MENTION]*almost hard bricked testing all of this for us.
[Samsung Galaxy S8+ Guides, News, & Discussion] monkey39:
Hello, I realize this is a couple of months old, but I'm trying to get wifi calling working on my phone with the Tmobile stock firmware and having problems. A little background: I have the AT&T S8+, which until recently was on the U1 unlocked firmware and Mint sim service (Tmobile MVNO). With the announcement of the BLv3 restrictions on firmware and phone matching, I decided to go to stock Tmobile. I did the carrier switching to TMB and flashed stock Tmobile firmware with the userdata file, but I don't seem to have wifi calling settings anywhere, either in Settings -> Connection -> More connection settings, or in the Phone settings. So I have a some questions about your solution, hoping to get more detail:

1. I had the sim installed when doing the carrier switching section - did you remove yours for it? And I'm assuming you switched to TMB, correct?

2. Did you flash the userdata file, or did you skip it? I've tried both ways with the same result - no wifi calling.

3. When you said it worked after phone setup, how much of a setup did you mean? I tried after setting up my Google and Samsung accounts, but before I restored my Samsung backup.

Thanks!
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
Hi!

1.Yes - completely have the SIM out while doing the steps. When I did that, everything Tmobile then worked, including wi-fi calling. And I am on MetroPCS, a Tmobile MVNO.

2. Yes, I flashed the USERDATA file in the steps under Flashing Standard firmware, after I had done the carrier switch steps. All of my files were ready, saved on PC, so there was no hesitation or hiccups. I definitely reccd having everything ready to go.

3. I waited until all was done flashing, then disconnected my device, and made sure it fully booted to startup screen. Then I entered my google creds. Once I was signed in, then I installed my SIM and checked for wi-fi calling and it was there!! Previously the icon wasn't even there. I think you can check for it even before you do google sign in.

Good luck!!
[Samsung Galaxy S8+ Guides, News, & Discussion] monkey39:
Cool, thanks so much for replying! Going to try this now, will update with results.
[Samsung Galaxy S8+ Guides, News, & Discussion] peyes:
Updating s8+

Hi! I think this off topic, but I have an ATT S8+ which I haven't update it since April, because I'm using it in another country. Is it possible to flash it with SM-G955U1 firmware? What are the implications? Can you dumbdown for me (newbie) the instructions?

Thanks!
[Samsung Galaxy S8+ Guides, News, & Discussion] monkey39:
Well, no luck for me, couldn't get wifi calling to work regardless of all the flashing/carrier switching I did today.[emoji21] But saw this post (https://xdaforums.com/showthread.php?p=75423191) stating that it looks like the U1 firmware might work on U phones, so decided to go back. Thanks for your help, in any case!

---------- Post added at 10:38 PM ---------- Previous post was at 10:19 PM ----------

Yes, very possible since that's exactly what I've been doing for the past 4+ months (I have an AT&T S8+ as well]. Not sure if I can simplify the instructions; the guide at the beginning of this thread is pretty detailed. I would say start at the Flash Unlocked Firmware guide and try that first. If the Prince Comsy Odin flash fails, then do the Carrier Switching guide (to XAA csc), then the Flash Unlocked Firmware guide, that should work for sure. Here's a link to the unlocked XAA U1 firmware that I used: https://updato.com/firmware-archive...+S8+&rpp=15&r=XAA&order=date&dir=desc&exact=1

Edit: you want the G955U1UES2AQL1 firmware.

Edit 2: now that I think about, you might want to start at an earlier version of the firmware and start from there, since you're probably on bootloader v1. You can tell the bootloader version by the number before the last 4 digits. Ex. From the version number above, the 2 in 2AQL1 tells you that firmware is bootloader v2. Then you'll be able to upgrade via OTA.

Be warned that that the download is EXTREMELY slow! Takes 10-15 hours at the rate the free download allows. I just let the download run overnight and proceed from there. The rest of what you need to download is in the OP.

Warning 2: BACK UP EVERYTHING BEFORE STARTING ANY FLASHING! This process completely wipes your internal storage; external sd card info should be fine.

NOTE: FWIW, if I was on a foreign country with a US Galaxy S8/S8+, I'd want to be on the unlocked firmware, as it would probably give me the most flexibility. And can confirm that you will get OTA updates on it, unlike the AT&T firmware (which requires an active AT&T sim card).

NOTE 2: be sure to remove your sim card before flashing anything, just to make sure nothing affects the configuration. I usually insert the sim card after flashing everything and completing login to Google.

Good luck![emoji106]

Edited for grammar and spelling.
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
BLv2 Unlocked

https://drive.google.com/open?id=1VfW8K3uCqGEW45NecEZD_NoD20ZOLiwT
[Samsung Galaxy S8+ Guides, News, & Discussion] jt1998:
Boo. Sorry it didn't work friend. Don't give up though!
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
I'm on the MetroPCS network and tried the tmobile firmware to try to get wifi calling and volte but couldn't get wifi calling but I did get volte working on initial boot. I messed around the menus trying to find the wifi calling option and rebooted after resetting apn settings to default to get metropcs access point and I lost volte for some reason. Went back to the u1(tmk(metropcs)) version of firmware and it all works now,
[Samsung Galaxy S8+ Guides, News, & Discussion] monkey39:
Yeah, I was trying to flash the TMobile firmware because of the BLv3 bricking scare. Since that turned out to be a non-issue, went back to U1 XAA and all is well.
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
You would've been fine even if the BLv3 bricking scare was true because it only meant you couldn't flash XAA or out of region firmwares or firmwares for entirely different phones.
[Samsung Galaxy S8+ Guides, News, & Discussion] monkey39:
Well, I originally had XAA on an ATT S8 plus, which was why I was trying to get TMB firmware working, since my current service is a TMobile mvno.
[Samsung Galaxy S8+ Guides, News, & Discussion] eddyo1993:
Could anyone help me. I keep getting this and I wiped my phone out in case something is preventing it still have the same problem. I am trying to do the carrier switch.

<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:0/005> Added!!

<ID:0/005> Odin engine v(ID:3.1207)..

<ID:0/005> File analysis..

<ID:0/005> SetupConnection..

<OSM> All threads completed. (succeed 0 / failed 1)
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
Try flashing home csc or normal csc
[Samsung Galaxy S8+ Guides, News, & Discussion] EonVerix:
Just curious if I was to flash unlocked firmware for BQK5 (I am on ATT) would that allow me to use the mobile hotspot feature?
[Samsung Galaxy S8+ Guides, News, & Discussion] threehornz:
I flashed my Sprint S8+ using the new v2 bootloader, new csc, and new unlocked firmware. Did carrier switching so now my csc reports as XAA just fine. When I tried it before with v1, the phone would say my AT&T sim was invalid. Now when I put in the AT&T sim, it doesn't give me an error message or anything, but it still says "emergency calls only" and I can't get any mobile data/calls/sms/whatever. Restarting the phone doesn't change the status nor does inserting the sim while the phone is on. I did get farther than before, but I still can't use the sim in the phone yet. Any ideas?
[Samsung Galaxy S8+ Guides, News, & Discussion] alirz:
The unlocked firmware doesnt unlock the phone to be used with any sim card. Sim unlock and unlocked firmware are two different things.
[Samsung Galaxy S8+ Guides, News, & Discussion] bauwoo:
I have a 955W on XAA but Volte isn't working on Bell network. Anyone know how to get it working on XAA?
[Samsung Galaxy S8+ Guides, News, & Discussion] deepdeep34:
i understand that this process does not unlock the phone. The verizon version is unlocked (i guess) by default would flashing it with t mobile firmware and using it on tmobile work?
[Samsung Galaxy S8+ Guides, News, & Discussion] tdamocles:
I'm planning to flash a phone for use on cricket. Which firmware will work best, ATT or the 955u1 unlocked firmware?
[Samsung Galaxy S8+ Guides, News, & Discussion] natecglenn:
I am on cricket and I just flashed the unlocked firmware today. It ha no bloat and I can even use the mobile hotspot feature without having it on my plan. I just can't use wifi calling. I have not tried the AT&T firmware which I probably won't do just cause of the bloat.

---------- Post added at 07:26 AM ---------- Previous post was at 07:26 AM ----------

Yes

---------- Post added at 07:27 AM ---------- Previous post was at 07:26 AM ----------

Doesn't sound like your phone is unlocked
[Samsung Galaxy S8+ Guides, News, & Discussion] Pickleboyofficial20:
hello this link is for at&t bootloader v2 aql1 or bql1?

because im on bql1 can I flash your update?

thanks in advance.
[Samsung Galaxy S8+ Guides, News, & Discussion] xdanilva:
Bootloader v2 any firmware you're on you can flash...
[Samsung Galaxy S8+ Guides, News, & Discussion] tsaoandy12:
After I follow the Carrier Switching tutorial which I think is successful change to XAA, but when I use the Phone Info app from play store, the Firmware's CSC Code and Active CSC Code are still showing TMB . Is that means I did not switch carrier successfully? or is just the app?
[Samsung Galaxy S8+ Guides, News, & Discussion] firefox15:
Would someone be nice enough to explain the importance of the Carrier Switching section? I thought you flashed a new CSC file with Odin. In fact, I've seen quite a few people elsewhere on the Internet simply go through the Updato/Odin process to convert from unlocked to carrier FW or another carrier. Is there a disadvantage to not setting the CSC to the matching FW before flashing? Will it fail or will I have missing features or something? Just trying to understand.
[Samsung Galaxy S8+ Guides, News, & Discussion] gottahavit:
So if I have an unloacked s8+ that I flashed VZW firmware to a while ago, is it safe to take the new security patch OTA coming from VZW?
[Samsung Galaxy S8+ Guides, News, & Discussion] thunderroid:
24) Click the "CSC" box and navigate to the “HOME_CSC” file you downloaded.

25) Double click on the file that starts with "HOME_CSC" (

DO NOT USE the "CSC" file for the "CSC" box

). It should load quickly.

What does the underlined text mean?

Note: NM, figured it out.
[Samsung Galaxy S8+ Guides, News, & Discussion] Reznick314:
This may have been asked already but what CSC code should i use for Sprint, SPR or XAS?