yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
You clearly haven't been reading the thread.

There is no such thing as carrier-specific builds on U models. If T-Mobile and AT&T both get the same build, then their 4 base firmware files will be identical. The only differences in firmware are found in the USERDATA file. If you want Night Mode, then find a build that has it included and flash the 4 base firmware files, and use the HOME CSC so that your data doesn't get wiped
[Samsung Galaxy S10+ Guides, News, & Discussion] stanleyopar2000:
Gotcha...so If I use the 4 base firmware files on the newest ATT build and flash HOME_CSC, I can have the newest features and still use advanced messaging and wifi calling?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
In theory, yes
[Samsung Galaxy S10+ Guides, News, & Discussion] stanleyopar2000:
Thanks,

I'm going to try this one on my TMB S10+. I'm not going to use U1 because my device is not unlocked.

https://androidfilehost.com/?fid=6006931924117910084 (SF6 is confirmed to have night mode)

In theory, it should work because I have a Sim locked SM-G975U on T-Mobile but i'm just using the firmware not the USERDATA to do a full carrier conversion. Also because it's "2" that means I can't go back if I have problems. (With TMB's OTA cycle being stuck on ASF7 since June, It's almost worth taking the risk)
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
1. You won't have problems. No, you can't go back to whatever you have now (assuming that you're still on bootloader 1), but if there's something you just can't stand about SF6, you can just flash any other bootloader 2 build

2. You're not doing a full carrier conversion. U1 firmware and USERDATA is required to do a full carrier conversion, and you won't be using either of those.
[Samsung Galaxy S10+ Guides, News, & Discussion] stanleyopar2000:
Appreciate the help friend. I remember doing this on my s9+ because TMB took forever with updates and the process is coming back to me. Apparently i'm already on Bootloader 2 as i'm on "G975USQS

2

ASF7" with T-Mobile so this should be easy. I'll then use Samsung.Firmware to grab the update.zip's to go from SF6 >> ASG8 >> ASGB (update from today apparently)

I believe that sounds about right? :)
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
No. Ugh. Why does no one ever read or listen?

1. Updating via zip in recovery mode wipes your data. No one likes wiping and setting everything back up.

2. Even if it didn't wipe, why go through the process of 2 updates when you can just download the Odin files for the end version that you want to be on, and flash that...?
[Samsung Galaxy S10+ Guides, News, & Discussion] jwarrior319:
You camt go from ASF6 without a factory reset(in my experience downgrading causes issues without a rest). I would use firmware science to get update file to ASGC. Although idk if that has night mode camera or not. Otherwise i would suggest a full backup before going the other route. (A full backup should be made before any flashing just to be safe)
[Samsung Galaxy S10+ Guides, News, & Discussion] stanleyopar2000:
...you mean to ASF6 right? I'm on the t-mobile exclusive ASF7 ATM. It's confirmed that the latest TMB update, ASGC does not have Night Mode and i'm tired of waiting for TMB to get it's act together. It's been 3. months.

Yeah, even though flashing HOME_CSC doesn't lose data, I should probably back up everything before doing this.
[Samsung Galaxy S10+ Guides, News, & Discussion] jwarrior319:
Yes typo. Cant go to ASF6 from ASF7 like that. Patched odin will allow it but i would backup everything because you might end up having to factory reset. Also make sure you dont have any themes applied via Substratum, Andromeda, or Synergy. I made that mistake once and couldn't get out of safe mode or make a backup.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
You should be just fine going down one tiny version. If you were going down a month or more (eg. SFx to SEx), then I'd say you might need to wipe. But you shouldn't have any issues
[Samsung Galaxy S10+ Guides, News, & Discussion] stanleyopar2000:
I'll have to look at patched odin if the process fails. My themes are luckily through Hex as it uses the Samsung themes engine.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Patched Odin has been required for flashing ANY Odin files, ever since the S8.

You *really* need to read the whole thread
[Samsung Galaxy S10+ Guides, News, & Discussion] Aaditya91:
U1 getting an OTA

Let's see if this has the features though, or just security patch.

EDIT: Has the Scan QR codes option & Night Mode in camera settings.
[Samsung Galaxy S10+ Guides, News, & Discussion] innocentone1:
What carrier
[Samsung Galaxy S10+ Guides, News, & Discussion] Aaditya91:
[MENTION=3327928]innocentone1[/MENTION] US unlocked. I am with Public Mobile in Canada.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Finally, bootloader 2 for U1! Someone should check to see if it's on SamFirm. I would, but I'm in bed already lol
[Samsung Galaxy S10+ Guides, News, & Discussion] dioncarval:
yes, it is
[Samsung Galaxy S10+ Guides, News, & Discussion] IyRuK:
I'm trying to flash from G975USQU2ASF6 to the U1 than T-Mobile version. but i keep getting errors. did verizon block downgrades? i can't seems to find a international firmware for 'u2'
[Samsung Galaxy S10+ Guides, News, & Discussion] stanleyopar2000:
[MENTION=3163377]iBowToAndroid[/MENTION] and [MENTION=320479]NotATreoFan[/MENTION]

I wanted to thank you for helping me out and being patient with my stupidity. After using SamFirm and the internet, I was able to go from SF6 to the newest ASGB without losing anything. Samsung.firmware updates.zip didn't work so I had to Odin up a few times. I probably broke T-Mobile OTA but with TMB's update cycle, it's not really relevant. Now I have Night Mode, camera improvements, QR Code scanner and even an enhanced photo editor!

Thanks again :)

Edit: @'d proper username
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
1. Not Verizon nor any other carrier can block downgrades. That's determined by Samsung, not the carriers.

2. There is no such thing as "international" firmware. There's only U (carrier) and U1 (bloat free)

3. If you mean that you're looking for bootloader 2 version of U1 firmware, you can get it very easily from SamFirm or Frija
[Samsung Galaxy S10+ Guides, News, & Discussion] IyRuK:
Is there a bootloader 2 version for T-Mobile?
[Samsung Galaxy S10+ Guides, News, & Discussion] teohjo:
Just to double confirm. I'm using AT&T S10+. I can safely flash from G975USQU2ASF6 to SG8 with CSC without loosing my data right?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Yep. SGC dropped yesterday, IIRC, according to user posts. Should be on SamFirm and Frija

If you use HOME CSC, yes
[Samsung Galaxy S10+ Guides, News, & Discussion] dioncarval:
Hi all

I have one question, i switched from a U verizon firmware to U1, after the factory reset, when i go to software information -> service provider SW ver, it says: XAA/XAA/VZW in the third line, shouldnt it says XAA/XAA/XAA??

does it remain something from Verizon firmware??

thanks
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
It has nothing to do with firmware. On U1 firmware, the last service provider code indicates which carrier customization is currently applied. If you insert an AT&T SIM and do the "reboot to apply new SIM card settings" that pops up, the code will change to ATT. Same for any other SIM that you insert
[Samsung Galaxy S10+ Guides, News, & Discussion] teohjo:
What if I flash to U1 firmware, do i need to factory reset?

If i have successfully updated with U1 firmware, any future update will still come from OTA or i have to use Odin forever?
[Samsung Galaxy S10+ Guides, News, & Discussion] dioncarval:
That's weird cause, I haven't inserted a Verizon sim card, I'm not In USA, so I use another carrier sim card I'll test with the sim card of another carrier to see if this change.

Thanks
[Samsung Galaxy S10+ Guides, News, & Discussion] bassoprofundo:
I don't see anything out there for the S10+ & T-Mobile that uses the v2 bootloader yet. Only one out there has Verizon userdata... Checked SamFirm/Frija and easy-firmware...
[Samsung Galaxy S10+ Guides, News, & Discussion] jjr3211:
i have been trying to find it but have not had any luck. Mine is a unlocked u1 but a am running at&t firmware on it right now and just want to go back to stock unlocked. any help finding it woud be great
[Samsung Galaxy S10+ Guides, News, & Discussion] antmontero2006:
I am also stuck on ATT firmware when I try to revert back to the stock U1 unlocked firmware....
[Samsung Galaxy S10+ Guides, News, & Discussion] bassoprofundo:
[/COLOR]

If you're just wanting to go to stock U1, that should be completely doable. I just did it myself the other day when the U1 firmware containing BL v2 dropped.

It's only the moving over to a T-Mobile U firmware with v2 that I haven't been able to do yet (not sure that I will since U1 stock firmware seems to be working fine... no issues with Wifi calling, VoLTE, etc.)
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
You can get SF7 via SamFirm if you use manual entry
[Samsung Galaxy S10+ Guides, News, & Discussion] jwarrior319:
If you don't want carrier bloat download the XAA (general unlocked) and flash that userdata file
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
USERDATA doesn't exist for U1. If you use SamFirm or Frija to download the entire firmware, you won't get a USERDATA file when you extract it. By definition, USERDATA is the carrier bloat and customizations, so it has no place in U1 firmware
[Samsung Galaxy S10+ Guides, News, & Discussion] antmontero2006:
Thank you. I will download from Sam...or Frija....later today and hopefully get it done.
[Samsung Galaxy S10+ Guides, News, & Discussion] Calape:
Sorry noob question. But I don't want to take risks, or ask unnecessary questions twice. I am not in the US but my phone is from AT&T and I no longer want its applications or logo when turning on/off, you can tell me how to go from U to U1 if I have already downloaded the G975U1UEU2ASGB firmware and I do not mind starting from scratch. Thanks in advance.

Note: Do I need official Odin or Patched?
[Samsung Galaxy S10+ Guides, News, & Discussion] jhs39:
Patched. After flashing the U1 firmware you need to factory reset from recovery or you will still have the AT&T stuff.
[Samsung Galaxy S10+ Guides, News, & Discussion] monkeyDroiid:
If in case I do flash to the U1 firmware, will I lose Wi-Fi calling on my S10 for AT&T?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
If you use the non HOME CSC, that does the factory reset for you

Maybe. Have to try it and see what happens
[Samsung Galaxy S10+ Guides, News, & Discussion] Calape:
I must give my sincere thanks to all who are part of this community. The wait was long but finally I could remove all traces of AT&T from my cell phone, I went from U to U1. Maybe it's the excitement, but it was really thanks to this forum. Please do not let him die, peace.
[Samsung Galaxy S10+ Guides, News, & Discussion] monkeyDroiid:
I am about to do the same, bud. Granted I still use AT&T but I don't want the bloatware on my unlocked phone.

---------- Post added at 12:16 AM ---------- Previous post was at 12:15 AM ----------

We all deserve to have control of our devices. We spend a thousand bucks on a phone that shall serve us for a few years.
[Samsung Galaxy S10+ Guides, News, & Discussion] tailgunner9:
Does the bootloader number have to be the same as the one on U1 and the U firmware. Want to flash my S10 that is unlocked model to T-Mobile as the unlocked U1 does not do well with my carrier T-Mobile on signal. Also should I flash the Userdata in the T-Mobile firmware and the CSC_OMC Thanks
[Samsung Galaxy S10+ Guides, News, & Discussion] monkeyDroiid:
It must match the version that you currently have installed.
[Samsung Galaxy S10+ Guides, News, & Discussion] jhs39:
U1 firmware doesn't have a User Data partition which is where the carrier specific apps and customizations are. If you flash from U firmware to U1 firmware and boot into the system without first doing a factory reset in recovery you will still have a U phone with the carrier apps and boot logo because Odin never overwrites the User Data partition. Flashing the non-Home CSC won't convert a phone from U to U1.

---------- Post added at 02:53 PM ---------- Previous post was at 02:40 PM ----------

You might because AT&T customizes some of the User Interface settings for their services and those customizations are on the same User Data partition as the AT&T bloatware. If you have an AT&T phone and successfully convert it to U1 you will notice that some of the actual settings (including the WiFi and Call settings) are different. I'm on T-Mobile so I'm not sure whether all AT&T services still work on U1 firmware. AT&T is way less BYOP friendly than T-Mobile.
[Samsung Galaxy S10+ Guides, News, & Discussion] webwolf89:
YAY, I also debloated my S10+ from AT&T ASF6 to ASGB (U1). I'm only confused with the Service provider SW ver. ending with XAA/XAA/ATT. Why is that ATT still there. Other than that, no mentioning of ATT anywhere. What does that actually mean?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
1. I wasn't saying to ONLY flash the CSC file. Using the non HOME CSC, in conjunction with all of the other files, will absolutely properly perform the conversion, without an additional reset needing to be performed via Recovery.

2. AT&T is 100% just as "BYOP friendly" as T-Mobile is. They're both GSM carriers, and both accept any compatible GSM unlocked device.

Even on U1 firmware, it still applies some small carrier optimizations, when you insert your SIM. Every time you change SIMs, you'll see a popup that says something along the lines of "restart to apply new carrier settings". The last Service Provider code will change accordingly
[Samsung Galaxy S10+ Guides, News, & Discussion] jhs39:
I purchased an AT&T unlocked S10+ but converted my phone to U1 because I use a T-Mobile MVNO. My model number and software shows U1 but the service provider still shows ATT like yours and I don't have AT&T service. Apparently that doesn't get changed if the S10+ was originally shipped as an AT&T phone. It doesn't affect anything--I get U1 OTAs rather than updates from AT&T.
[Samsung Galaxy S10+ Guides, News, & Discussion] awireless:
The last CSC in the three is just the original carrier that was hard programmed into the phone after the phone was made you can change it by rooted but root for this phone doesn't exist that im aware of. It doesn't change anything that you can notice.
[Samsung Galaxy S10+ Guides, News, & Discussion] jhs39:
1) There is another XDA thread with U & U1 firmware download links for the S10+. In that thread multiple people reported that when they tried to convert their phones from U to U1 firmware using the non-home CSC as you suggest their phones still booted up with carrier branding and in some cases with carrier apps depending on which firmware they were converting from. You can't completely convert from U firmware to U1 just by flashing through Odin because U firmware includes a User Data file containing the carrier specific branding and apps. U1 firmware has no User Data file to select in Odin so that data isn't completely written over when you convert the S10+ from U (carrier branded firmware) to U1 (firmware used on unlocked phones Samsung officially sells).

2) I've been using unlocked phones for the last 5 or 6 years. With T-Mobile WiFi Calling and Volte work out of the box unless the phone isn't compatible with those services. AT&T customers frequently complain on XDA that they have to call AT&T's customer service to get WiFi Calling and Volte to work on their BYOP device.

The U1 firmware will provide carrier optomizations based on the inserted SIM card but AT&T firmware makes changes to Samsung's One interface specificly for its own services. The UI settings in AT&T's U firmware are different for WiFi, WiFi Calling, and Volte than the ones in U1 firmware and AT&T's dialer and messaging apps have some different settings from the U1 versions.

AT&T is also the only major North American carrier that doesn't make the User Data from their firmware available to download through third party services like Samfirm that pull firmware directly from Samsung's servers. AT&T keeps that data exclusively on its own servers instead of Samsung's.
[Samsung Galaxy S10+ Guides, News, & Discussion] neilfairall:
I just switched to T-mobile for carrier. I picked up an unlocked S10+ because my Note 8 died catastrophically. Flashed AT&T firmware because that seemed to work to enable WiFi calling for my Note 8.

After it didn't work I spent a couple of hours talking to increasingly senior AT&T techs until they told me that I was never going to get that functionality on my unlocked device. Don't anyone make the mistake of thinking that AT&T is as device friendly as any other carrier.
[Samsung Galaxy S10+ Guides, News, & Discussion] johnwayne27:
I successfully used samfirm app to download the latest v2 firmware and switch from VZW to U1(finally) frija gave me problems and the downloaded zip, once decrypted, only had 2 files in it. The one from samfirm had 5. I use cricket wireless go may go ahead and switch to ATT. I will keep posted if VoLTE works once I do that. It did not work with VZW firmware and U1(expected)
[Samsung Galaxy S10+ Guides, News, & Discussion] jhs39:
I'm pretty certain there is S10+ firmware with a Cricket specific User Data file. That would be much better than flashing AT&T firmware because your service is through an AT&T MVNO with its own apps rather than with AT&T itself. Cricket doesn't use any of the AT&T apps you'll find in the AT&T firmware which is modded for official AT&T service.

I used to be on Cricket. If you're using a phone that didn't come directly from Cricket you need to call their customer service to get Volte or WiFi calling to work.
[Samsung Galaxy S10+ Guides, News, & Discussion] johnwayne27:
I thought of that too but it has to be a phone cricket carries for there to be a firmware. They dont carry the plus, only the s10. You are right. It would be way better.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
I own a business that performs software-related services for mobile devices. U to U1 conversion is something that we do all the time. And trust me, it works perfectly fine if it's done correctly. Any users still seeing remnants of carrier apps/bloatware didn't do it correctly -probably because they used HOME CSC. If you understood how the partitions and flashing worked, you would know that the use of the PIT file makes the whole USERDATA thing irrelevant.

Some users have reported that calling works on U1 firmware, and other users have seen differently. One user also posted that it worked after they flashed W (Canadian) firmware - you could try that too

Correct
[Samsung Galaxy S10+ Guides, News, & Discussion] neilfairall:
That ship has sailed, but thank you for the suggestion! I am happily WiFi calling on T-Mobile. I flashed the U1 (G975U1UEU2ASGB) firmware in place of the AT&T firmware today, with a factory reset from the phone to begin with, and another one from recovery for good measure before I launched ODIN. No trace left of AT&T that I can see, and there was a reboot to apply T-Mobile settings after it first started up with the T-Mobile SIM.
[Samsung Galaxy S10+ Guides, News, & Discussion] johnwayne27:
Well you cant flash to ATT firmware without a ATT sim. I tried with a cricket and it stayed unlocked. So I am stuck on unlocked unless I can dig up an old dead att sim somewhere in my closet lol. I figured a cricket sim would allow att flash but it will not.

Went from vzw to U1 originally(V2)
[Samsung Galaxy S10+ Guides, News, & Discussion] jhs39:
You are better off with the U1 firmware than AT&T firmware if you are on Cricket anyway. The AT&T firmware won't give you WiFi Calling or Volte on Cricket, won't give you a better signal and is designed for AT&T branded services that you don't have through Cricket.
[Samsung Galaxy S10+ Guides, News, & Discussion] swong56:
It seems a lot people is having success in flashing there phone. I cant seem to flash my verzion firmware to stock. Its unlock using tmobile sim card for now. Im guessing it's because the firmware is too new (G975USQ2ASGB). And I have to wait for a newer stock firmware. I've been getting fail auth everytime i try flashing it to stock.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
We don't know what "flashing to stock" means - it's too vague. If you'd like us to assist you, we need to know exactly which firmware you have now (U or U1, and Build Number), and exactly which firmware you want to go to
[Samsung Galaxy S10+ Guides, News, & Discussion] swong56:
firmware on it is verzion ((G975USQ2ASGB). I want to flash it to U1 sasmung firmware. I've downloaded the SAT-1 firmware form this site. I guess thats too old. (G975U1_SAU_1.zip)
[Samsung Galaxy S10+ Guides, News, & Discussion] johnwayne27:
Factory reset, reboot into recovery, flash the bl, cp, ap, and csc,(not home csc), then when it reboots it will say erasing/installing and reboot again. Hold the vol up and bixby to get recovery and factory reset again. Good to go after that.
[Samsung Galaxy S10+ Guides, News, & Discussion] swong56:
flash the firm in recovery mode? not download mode? well odin work in recovery mode? or do i need a different program?
[Samsung Galaxy S10+ Guides, News, & Discussion] jwarrior319:
ASAU is original release firmware on bootloader 1. Current firmware on both is on bootloader 2. You will need to download G975U1UEU2ASGB

The 2 before ASGB means bootloader 2. Samsung doesn't allow going back to an older bootloader for "security" reasons(less chance we gain root).
[Samsung Galaxy S10+ Guides, News, & Discussion] swong56:
thanks for your help. It looks like i didnt restore it to factory default before i flashed. I got it working now.
[Samsung Galaxy S10+ Guides, News, & Discussion] johnwayne27:
Glad to hear it. I like U1 way better. My tethering works without paying extra, better signal, and the dialer codes work now *#*#4636#*#* etc. They wouldnt work on carrier firmware.