yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S9+ Guides, News, & Discussion] kevindevonwilliams:
The last one is the origin, it won't change. Yours would say XAC because it's the Canadian default CSC.

His for example would say ATT because it's an ATT model..
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
That is good to know. I take it that is something that is different from the CSC contained in the firmware images?
[Samsung Galaxy S9+ Guides, News, & Discussion] kevindevonwilliams:
Well CSC stands for Customer Service Code... So basically it contains a few needed stuff (network setup for a specific region, fota update etc)
[Samsung Galaxy S9+ Guides, News, & Discussion] HACK3DANDR0ID:
What kind of speeds are you getting? i am getting 180+mbps DL and like 30+ UL speeds on TMO...

*edit*

Using OpenSignal for testing speeds....
[Samsung Galaxy S9+ Guides, News, & Discussion] yeltrah123:
Just curious did anyone get this update with May security patch? https://ibb.co/eWEbeH
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
Some have, but there is no ODIN version of it yet. Give it a week or so and I'm sure we will have it to flash.
[Samsung Galaxy S9+ Guides, News, & Discussion] yeltrah123:
Oh ok. Yeah I'm currently on it and said I don't think everyone has it as of yet.
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
You don't need the Odin files to flash, when you can update to ARD9 manually. Since they're both on bootloader version 2, once you update to ARD9, you can easily return back to ARC6 by flashing back to ARC6.
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
Here's the OTA update...

Download Here: 2ARC6 to 2ARD9
[Samsung Galaxy S9+ Guides, News, & Discussion] Son Rise:
What carrier is this for?
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
Mainly for TMB & ATT or whoever is on build 2ARC6.
[Samsung Galaxy S9+ Guides, News, & Discussion] storm68:
Why would I flash this? What's the reasoning? In case I go into a boot loop? Or brick? Not understanding why? To update due to my phone never updating? :silly:
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
Not quite understand your question.
[Samsung Galaxy S9+ Guides, News, & Discussion] dannyHD2:
Will flashing this from arc6 att help carrier switch to T-Mobile with tmb user data or should we keep waiting for u1 on v2 to come out first? Thanks
[Samsung Galaxy S9+ Guides, News, & Discussion] chowdarygm:
I am on ARD3, so I should wait for the odin version of ARD9 now? No update file from ARD3 to ARD9?
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
I checked and there was no file available yet from ARD3. What you could do is Odin 2ARC6 and then update to ARD9. There is a file update from ARC6 to ARD9.
[Samsung Galaxy S9+ Guides, News, & Discussion] chowdarygm:
Thank you, will do that
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
Keep waiting. There's really no permanent method on carrier switching as of yet on the S9 series. Those who were successful, got lucky. So whoever was successful, it would be helpful to share it, so others can benefit from it. Thanks.
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
Carrier switching is possible. You can't do it though currently if yournbootloader has been upgraded to v2, which would be AT&T and T-Mobile variants. You need to flash to the non-carrier firmware first, which is still using the v1 bootloader. So far, trying to flash the v1 bootloader over the v2 causes the flash to fail. I have yet to read a poat though where the rest is flashed where the bootloader is. Ot. I have been considering flashing AR6 but leaving the bootloader out to see if I end up with 1ARC instead of 2AR6. I haven't had the time to do so as of get though because the S9 Plus is my main phone.
[Samsung Galaxy S9+ Guides, News, & Discussion] coolbrezze67:
I've tried flashing this several times, no success at all. It just fails about 1/4 of the way. Please help. Yes I read all the threads
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
What's your build number?
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
Have you tried the one from here?

https://androidfilehost.com/?w=files&flid=259921

XAA_G965U1UEU1ARBG_ODIN_Files.zip is what you want. The files in the original post seem to be very hit and miss, at least from my experience. You also need to wipe user data so make sure you flash the correct CSC, not the HOME CSC. What firmware is your device currently running?
[Samsung Galaxy S9+ Guides, News, & Discussion] coolbrezze67:
As far as I can tell it's the latest from t mobile. Here it is
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
That would be why! You have the v2 bootloader, which prevents flashing back to firmware with the v1 bootloader. Unfortunately, that leaves you stuck with the T-Mobile firmware until a U1 firmware comes out with the v2 bootloader and the firmware you ultimately want to flash comes out with a v2 bootloader firmware as well. The 2 before ARC6 is what version of the bootloader the firmware contains.
[Samsung Galaxy S9+ Guides, News, & Discussion] coolbrezze67:
Thank you for answering me. This sucks!!
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
No prob. Hopefully something can be done to get around that and soon. Have you tried only flashing the U1 firmware but without flashing the bootloader? Even though I use my phone on T-Mobile, I don't want to lose the ability to go back to the U1 because I do travel back and forth between Canada and the US frequently.
[Samsung Galaxy S9+ Guides, News, & Discussion] coolbrezze67:
No, I need Sam pay and I travel to South America and Caribbean
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
Samsung Pay still works on v1 bootloaders. I don't know if mixing firmware elements will break that though. I have Samsung Pay installed and updated from the Play Store on the 1ARBG U1 firmware.
[Samsung Galaxy S9+ Guides, News, & Discussion] coolbrezze67:
Where can I get this firmware without the bootloader?
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
Most ODIN zips contain the bootloader. I am not too sure if there is one that has that removed that is still flashable. Out of the multiple files being flashed, I'm guessing the one that you load in BL, would be bootloader...? Perhaps someone could clarify that.
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
He's stuck on bl v2, until they release bl v2 for U1.
[Samsung Galaxy S9+ Guides, News, & Discussion] zeeshmk:
I am on AT&T with this build no: R16NW.G965USQU1ARB7 Does anyone know if this uses Bootloader V1 or V2? Also how can I update the firmware to stock unlocked version? I would like to replace the AT&T firmware with the unlocked version. However, when i tried with this firmware (https://androidfilehost.com/?w=file...ba20ddcaf271edbb09e8023cfe7e39633b251d24e1abd ) , I got an error in ODIN saying the SHA256 hash is not valid
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
Try this one.

https://androidfilehost.com/?fid=818070582850506637
[Samsung Galaxy S9+ Guides, News, & Discussion] dannyHD2:
I was thinking about this as well. Wondering what the outcome would be flashing everything but the b bootloader but i was/am afraid to try it. My s9 is my primary phone in can't afford a brick right now cause all my backups have broken screens except my s7 that i traded in lol
[Samsung Galaxy S9+ Guides, News, & Discussion] chowdarygm:
I was on ARD3, so I odined back to ARC6 and updated to ARD9 from ARC6, but then my Samsung account got reset and Samsung Pay stopped working. I tried resetting the app, clearing cache, resinstalling, nothing is fixing SPay. Attached is the error I get. Any thoughts?
[Samsung Galaxy S9+ Guides, News, & Discussion] zeeshmk:
Thanks I'll give that a try. Do you happen to know if my build (R16NW.G965USQU1ARB7) is on Bootloader v1 or v2?
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
It's on bootloader v1. The (1) before ARB7 is the bootloader version.
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
I'm guessing you didn't flash the userdata when flashing backwards?

I don't think anyone can guarantee it won't brick. I don't know what security measures Samsung has in place during the flashing process. Based on what I have seen from flashing forward and those who reported failing were still be able to get into download mode and flash again.

I can totally understand not wanting to take the chance of bricking your phone. I literally hard bricked my V30 trying a similar process. There is always some risk. Thankfully my V30 was only two months old and LG decided to replace it because after flashing, it wouldn't even turn on. :P Then again. If that wouldn't have happened, I would not have bought my S9 Plus, which after some reading up on ODIN, flashing, and a lot of Samsung debloating. I am very happy with the results. To make sure I am comfortable with the process, I have actually done it a few times. That is why I recommend the XAA image over the one linked in the OP because I have had errors and fails with the one downloaded from the OP.

Flashing without your SIM in it to the U1 image and setting it up will pretty much give you a completely non-carrier branded device with no APN's or anything for those who literally want to attempt everything from the point of scratch. Leaving your SIM in will get you a blue screen with a white Android that adds an extra boot to basically install carrier settings and also changes the first two of the three in the software provider version to the carrier your SIM ID's during that boot. I have tried U1 flashing as XAA/XAA/XAC (no SIM) because my phone was originally a G965W and TMB/TMB/XAC (T-Mobile SIM) and there wasn't much difference in the end other than the time it takes to get things all set back up. I can't stress this enough to anyone. Full wipe to U1 will save you a lot of potential issues.
[Samsung Galaxy S9+ Guides, News, & Discussion] dannyHD2:
For right now i just disabled all the att apps i could to remove them and installed all the T-Mobile ones and everything is pretty much working except the VoLte and wifi calling and hd voice and direct video. I use duo a lot so video calling isn't that big of a deal. But if i need to look something up during a phone call it's a lil annoying. And then it says att on start up still but how often do you restart your phone lol. It's adequate until the version 2 bl of u1 comes out. It's tolerable and still a great phone so I'm happy with it
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
One of the great aspects of flashing to U1 over the specific T-Mobile firmware is, you don't get the branded boot animation. You just see the S9 or S9 Plus logo. Having your SIM in when flashing ensures the appropriate settings are downloaded during the setup process. U1, at least in my opinion, is the best firmware to be on regardless of your carrier. I have band 71 available, WiFi Calling, VoLTE, and all of the APN settings are there when the setup process is complete. I haven't personally used Direct Video but I wouldn't be surprised if it is there. Hopefully a way to either roll back the bootloader or to keep the v2 while switching to the U1 firmware becomes available soon.
[Samsung Galaxy S9+ Guides, News, & Discussion] todd3835:
I have the same problem. Went from ARBI (ATT) up to ARD9, which doesn't allow Google Pay to work. Odin to ARC6, and Google Pay works, but not Spay. I have a ticket in. Called them twice. First they blamed my bank. Then they said it could be a server issue on their end.
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
It won't work if Google play store is not certified and it didn't pass safety net. I believe ARD9 & ARDA aren't certified and it doesn't pass safety net. I would recommend staying on ARD3 or ARC6 for the time being.
[Samsung Galaxy S9+ Guides, News, & Discussion] dannyHD2:
I understand exactly how this works, but my issue is I'm already on 2arc6 so I can't go to any u1 firmware because there aren't any on bootloader version 2 yet. Can't flash backwards to version 1 firmware once you go to any version 2 firmware. Also I have the att variant s9+I'm just using it on T-Mobile.

I purposely bought the att variant because Samsung had it on sale for $200 off so I figured I could flash to T-Mobile and save big. Plus trading in my s7 got me another $200 off so I couldn't pass it up. Oh and though i already have a dex station from my s8 and note 8, i got a free dex pad coming next week with my order ???
[Samsung Galaxy S9+ Guides, News, & Discussion] zeeshmk:
That's helpful. thanks!
[Samsung Galaxy S9+ Guides, News, & Discussion] chowdarygm:
Do I need to? I flashed without userdata in past to previous firmware's and had no issues.
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
It isn't needed but doing so ensures you have less of a chance of having any issues with apps and such.
[Samsung Galaxy S9+ Guides, News, & Discussion] JD76:
Im so confused... I have a ATT Unlocked S9+ with Bootloader v1 (G965USQ1ARB7).. Im a T-Mobile customer and want the phone to be used on T-Mobile and will be happy with normal OTA updates thereafter... What do I specifically flash to make this a standard up to date T-Mobile device?
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
For some reason, T-Mobile has pulled the 2ARC6 update so don't flash that. Your best bet is to flash to the XAA U1 firmware with the patched ODIN with your T-Mobile SIM in it. Doing so will get the TMB stuff downloaded on first boot so you will have the correct APN settings, Visual Voice Mail app, VoLTRE, and just about everything you need to have a good experience with it on T-Mobile, band 71 included.
[Samsung Galaxy S9+ Guides, News, & Discussion] JD76:
So that would be this file? https://updato.com/firmware-archive-select-model?record=182E00202C6211E89F15FA163EE8F90B
[Samsung Galaxy S9+ Guides, News, & Discussion] chowdarygm:
No luck, flashed all the files including Userdata and still same problem with Samsung pay. Guess I need to format and set it up as new.
[Samsung Galaxy S9+ Guides, News, & Discussion] zeeshmk:
Tried this firmware with Odin 12.3.7 build : https://androidfilehost.com/?fid=818070582850506637

Tried multiple times and I keep getting this error:

<ID:0/004> SetupConnection..

<ID:0/004> Complete(Write) operation failed.

<OSM> All threads completed. (succeed 0 / failed 1)
[Samsung Galaxy S9+ Guides, News, & Discussion] zeeshmk:
Finally manage to upgrade by doing all of these

- Factory reset

- Replace usb cable

- Use SHA patched ODIN version

I am now on unlocked firmware woohoo!!
[Samsung Galaxy S9+ Guides, News, & Discussion] todd3835:
I was having the same problems you were. I tried multiple things. Installing SPay from Play store, From Galaxy Apps Store, no luck at all. Wiped settings for framework and SPay. No dice. I "reset" the SPay app, and then factory reset. That seems to have done the trick. I'm not enjoying the time it's taking to re-install my 140 apps, but at least SPay let me add my card again. Hope a factory reset works for you as well.
[Samsung Galaxy S9+ Guides, News, & Discussion] geoff5093:
Unfortunately that didn't work for me, I'm using a T-Mobile MVNO and when flashing the U1 firmware it doesn't download any T-Mobile apps, and there is no VoLTE setting. I was hoping flashing the 2ARC6 would make it work, but now I'm not so sure.

---------- Post added at 08:46 AM ---------- Previous post was at 08:37 AM ----------

Are you on T-Mobile postpaid? I wonder if the only reason I don't see the VoLTE setting is because I'm on Mint, which is a T-Mobile MVNO.
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
With 2ARC6 being pulled. I wouldn't personally suggest flashing it because you can't go back. If it doens't work, you are stuck with it. My T-Mobile service is through T-Mobile postpaid. I tried flashing a few different ways to get mine to the way I have it now. Flashing the TMB-1ARBG after U1 with no SIM in it and flashing U1 with my T-Mobile SIM in it. They both came up TMB/TMB/XAC for me where the only difference I have seen is, it lists the model number as a G965U1 instead of a G965U. I did't flash the HOME CSC though and I do flash userdata after factory resetting to make sure I had no issues. It sucks setting up my phone again, downloading apps, setting them up, etc., but it has worked out well, at least in my opinion.
[Samsung Galaxy S9+ Guides, News, & Discussion] geoff5093:
Thanks for the info. I tried several ways as well, but I think it's just my MVNO. I was in Maine last week and didn't connect to band 71 in areas it should have been, so I figured it was because I didn't have VoLTE, but I can connect to band 12 so I'm not sure.

Right now I flashed the U1 firmware with the TMB user data, and it seems to be fine minus no band 71, but again I think that's the MVNO. With a T-Mobile prepaid SIM it restarts and when I dial *#2263# I see that band 71 is selected.

My software with Mint is showing XAA/XAA/VZW.
[Samsung Galaxy S9+ Guides, News, & Discussion] yeltrah123:
Hey guys I'm currently on build number G965USQU2ARD9 with Boost Mobile does that affect the phone performance since it's made for a device using T-Mobile?
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
Same here :)
[Samsung Galaxy S9+ Guides, News, & Discussion] dannyHD2:
The firmware is sorta irrelevant since it's the same across all platforms (depending on your country) it's the user data that counts and brands the device. The csc is the radio stuff for your particular carrier as well. Hope that helps
[Samsung Galaxy S9+ Guides, News, & Discussion] zeeshmk:
Friend of mine has an s9 plus that came with this build - G965USQU1

ARBI

He wants to first update to stock unlocked firmware and then to Tmobile. Can you guys please suggest what build he needs to install to first go to unlocked and then to tmobile version?
[Samsung Galaxy S9+ Guides, News, & Discussion] dannyHD2:
You'll want to factory reset then flash the u1 firmware first before anything else. Then the T-Mobile firmware but i would not flash the 2arc6 build since it was pulled. If it were me i would flash the version 1 bootloader tmb first before trying a version 2 firmware and then let the phone update ota from TMobile after you set it up. But I'm sure there's other recommendations that you'll get.
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
No it won't effect anything.
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
Why not stick with U1 for now? if you flash it with the T-Mobile SIM in it, then you should be good to go and all of your carrier settings and stuff will download when the phone boots up after flashing.

I agree. Stay far away from 2ARC6. We still don't know why it was pulled and there is no way currently to return to U1 after flashing a firmware with the v2 bootloader. If the person doesn't want to remain on U1, then I would suggest flashing TMB-G965USQU1ARBG.
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
2ARC6 wasn't pulled, because it's the latest legit version of T-Mobile. Everything I post are legit firmware, trust me I wouldn't be posting things that would jeopardize anybody's device. Like the title states //G965U TMB\\ Stock Odin files. Which means it's specifically for T-Mobile. I also stated in the beginning of the thread, that it contains bootloader version 2 and there is no return. People wouldn't be experiencing any issues, if people would read and stick to their proper firmware to their device, instead of mix and matching firmwares to other devices. When there is clearly no permanent solution on carrier switching on the S9 series, as of right now. There's always risks involved and you're accountable for whatever may happen to your device. So please stick to your carrier and firmware to your device. This is not a thread for carrier switching. If someone would like to open up a thread based on troubleshooting on carrier switching, on firmware or OTA updates, then do so. So let's try to stick to the topic of this thread, that was originally intended for. Since I am the creator of this thread. I do try my very best to provide help to others and I don't mind sharing or helping. If you need firmware or OTA updates to any specific carrier, please feel free to PM me. So for now please keep the topic on hand, so there's no confusion to other users. Thank you. :good: :)
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
U1 is relevant though because you have to flash to it first before you can flash another carriers firmware outside of what the device came with. 2ARC6 was the latest firmware until T-Moble pulled it. You might want to consider editing the OP to reflect that the firmware posted in the OP was pulled by T-Mobile and is no longer listed as the lastest T-Mobile firmware.
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
Not trying to be rude or no disrespect, but answer this question, is this a U1 thread? If not, the subject is irrelevant. I posted a U1 thread, so please go ahead to that one. 2ARC6 is not pulled, every single OTA is coming from 2ARC6, for example 2ARC6 to ARD3, ARC6 to ARD9, ARC6 to ARDA. Trust me if it was dead like you said, they wouldn't keep releasing OTA or beta files from that build and I have every single OTA from T-Mobile's server.
[Samsung Galaxy S9+ Guides, News, & Discussion] Venom0642:
Haha you forgot to mention ARE1 lol anyway back to topic.??
[Samsung Galaxy S9+ Guides, News, & Discussion] bboii86:
Lol you see? Even ARC6 to ARE1, thanks venom for reminding me of that one lol
[Samsung Galaxy S9+ Guides, News, & Discussion] dannyHD2:
I'm still using it and haven't had any problems on 2arc6. Other than not being able to do anything else and being stuck on it but it's been working for me for about 2 weeks now
[Samsung Galaxy S9+ Guides, News, & Discussion] Iain_S:
I am currently running the U1 firmware on my Rogers S9+, no issues.
[Samsung Galaxy S9+ Guides, News, & Discussion] dwhite011:
Volte, wifi calling?
[Samsung Galaxy S9+ Guides, News, & Discussion] 52me52:
At&t S9+, used Odin twice to flash went from v1 to v2 ARC6. All At&t stuff still present: boot logo, apps, service provider in software info. Nothing changed except going to v2. Can't seem to get it to convert to T-Mobile?
[Samsung Galaxy S9+ Guides, News, & Discussion] FatalONEM8:
I'm pretty sure you need a TMO SIM.
[Samsung Galaxy S9+ Guides, News, & Discussion] 52me52:
Left the Sim card in both times, it's originally At&t got it 3 days ago and unlocked it. Trying to flash to TMO for wifi calling.
[Samsung Galaxy S9+ Guides, News, & Discussion] FatalONEM8:
I don't know if you can, I would try factory resetting from settings with the tmobile sim card in, I'm not sure that'll make it tmobile but I think I saw somewhere that's how it was done before...
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
Did you factory reset the device before flashing?: Did you also flash the userdata for T-Mobile? Now that you are on 2ARC6, you are stuck on it. T-Mobile has pulled that firmware but people don't seem to have any issues with it. You might want to try factory resetting it and reflashing the T-Mobile factory image again.
[Samsung Galaxy S9+ Guides, News, & Discussion] 52me52:
I did not reset it before flashing, but I first used the CSC file the first time which did nothing except get me to v2. then the second time I used the Home CSC file which factory reset my phone except it was still At&t.
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
The HOME_CSC leaves some things untouched from my understanding. I would try a factory reset, then reflashing with the non-HOME_CSC and flashing userdata. At the very least, that will get rid of the AT&T stuff lingering behind.
[Samsung Galaxy S9+ Guides, News, & Discussion] 52me52:
Thanks will try it out! ?
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
Anytime! Did everything go well and turn out the way you want the device to be?
[Samsung Galaxy S9+ Guides, News, & Discussion] 52me52:
Didn't have the time to yet, currently fishing for the past few hours needed my phone just in case.
[Samsung Galaxy S9+ Guides, News, & Discussion] jcsww:
That sounds like an excellent way to soend the day. Enjoy it!