yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Being able to identify the bootloader level is one of the most basic - and most essential - steps of being able to flash Samsung firmware. I would highly recommend reading at least one of the many "beginner's guide to Odin flashing"-type threads that are found all over XDA

Once you're able to identify the bootloader level, you would need to consult a source that will list all of the updates that that model has received, and go back to the first release of its given bootloader level and see if it's an older Android version than what the device currently has. If an older Android version is listed within the same bootloader level, you can downgrade to it. If an older Android version does not appear in the list until you reach an older bootloader level, then you cannot downgrade to it
[Samsung Galaxy S10+ Guides, News, & Discussion] s4androiduser:
I'm on Bootloader version 4.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Then you're stuck on Android 10. You would have to have bootloader 1 or 2 in order to be able to flash back to Android 9
[Samsung Galaxy S10+ Guides, News, & Discussion] s4androiduser:
I just want to get rid of 2.5.. and its not possible to go back down to 2.1?
[Samsung Galaxy S10+ Guides, News, & Discussion] PANQUEMAO:
That its no possible.
[Samsung Galaxy S10+ Guides, News, & Discussion] JDBarlow:
Will it not let you flash 3DTF1

Looks like that may have been the last 2.1
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Uhhhhh, 2.5 just started rolling out in the past month or so. So yes, flashing a bootloader 4 version that was released 2 months ago or more should take you back to One UI 2.1
[Samsung Galaxy S10+ Guides, News, & Discussion] JDBarlow:
If I wanted to get rid of something I wouldn't hesitate to try something different ?
[Samsung Galaxy S10+ Guides, News, & Discussion] JhonyTechGeek:
I need android 10 version firmware
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Well you're in luck because Android 10 was released a year ago. So there have been LOTS of Android 10 firmwares since then
[Samsung Galaxy S10+ Guides, News, & Discussion] TheCapesCrew:
Quick question... Tomorrow I'll be having a S10+ delivered and I'm curious as to if anyone has came across Crickets (AIO) firmware / USERDATA. Thanks in advance!!
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Nope, Cricket never chose to carry this model. So no Cricket firmware exists for it.
[Samsung Galaxy S10+ Guides, News, & Discussion] stefanmkru:
download link for U1 android 10 version for 975U ?

my device s10+ SM-G975U (sprint unlocked) want to flash to non carrier firmware
[Samsung Galaxy S10+ Guides, News, & Discussion] sw1173:
Check the OP and carefully follow the instructions.
[Samsung Galaxy S10+ Guides, News, & Discussion] stefanmkru:
downgrade to android 9 ? can i flash that on mine android 10, one ui 2.5?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
That has already been answered in the thread
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
AT&T USERDATA for Android 11 has been added - build TLN. I also added the rest of the full firmware package because no one else had uploaded it to AFH yet
[Samsung Galaxy S10+ Guides, News, & Discussion] yangyangyang:
good…………………………………
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
Where do I find the USERDATA's?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Which ones are you referring to?
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
I might just be confused/or doing the op wrong. I have s10+ that was sprint branded and trying to use my phone on tracfone. I believe I used the right firmware in odin. I am still not really getting service. In my settings it still says SPR/SPR/SPR but my phone is now running U1
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Was the phone already SIM unlocked, before you started all this?
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
Yes its sim unlocked.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
1. Is the phone giving any error messages or notifications?

2. Which build did you flash?
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
1. The phone works somewhat. There is a trying to activate on a sprint network notification that comes up. It has only the tracfone sim card in it.

2. I flashed the U1 XAA and it passed in odin
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
But which specific build?
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
Not sure where I find that. I downloaded for SM0G975U1 and XAA

SM-G975U1_2_20210127152005_kx6up04178_fac is the unzipped folders name

I just dont understand why it stays SPR/SPR/SPR
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
These are examples of builds:

G975U1UEU4FUA4

4FUA4

UA4

Tells me/us which specific version you flashed
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
Build is G975U1UEU4FUA4 in my about phone settings
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
The CSC code not changing is something I've seen lately. Mainly on T-Mobile S21s, but this is the first I've heard of any other models being affected. So idk if it's due to a recent change they made, or if it's just a glitch/bug, or what...

I'd recommend flashing an order version and see if the same thing happens. And leave your SIM out when you flash
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
Ok thats what i am gonna try to do. If I am correct I need a version that has 4 as the 5th from last number becasue i have 4FUA4 ? Thank you
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Correct
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
I flashed back to G975U1UES4ETK1 and still not changing
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Try inserting a different carrier's SIM, to see if you get the popup prompt
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
I inserted my roommates active Mint SIM. It let me make phone calls instantly. No popups happened. I restarted and it said Mint at the top with full bars. let me make calls. CSC stayed SPR/SPR/SPR. I put my tracfone/t-mobile sim back in. restarted still no popups or changing. But... now all day my phone worked fine. Could make calls, texts, data. But still SPR/SPR/SPR. So confusing but happy to be working i think. Now I am doing the new update and hoping it still is working.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Mint doesn't have their own firmware/CSC for this phone, so it probably wouldn't prompt for the firmware conversion. Try inserting a SIM that's actually from one of the main networks, instead of a prepaid MNVO SIM
[Samsung Galaxy S10+ Guides, News, & Discussion] phishyd:
Thanks. I figured it wouldn't seeing as it was MNVO. I planned on trying an actually Verizon SIM tonight. Thanks
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
If anyone wants to try out One UI 3.1, it's available for the Verizon version via the various firmware download tools - build UBH. This update does increment the bootloader to 5, so you would NOT be able to downgrade if you don't like it or if there are bugs
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
AT&T USERDATA for bootloader 5 has been added - same build of UBH
[Samsung Galaxy S10+ Guides, News, & Discussion] PlutoDelic:
Quick question, as i always forget or confuse myself in this subject.

Is the VZW OTA flashable on a U1 (latest official build, XAA)?

They're really taking their time on 3.1.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
If you're asking if you can flash U firmware to a device that currently has U1 firmware, that's already answered in the OP
[Samsung Galaxy S10+ Guides, News, & Discussion] PlutoDelic:
@iBowToAndroid what i meant was sideloading the OTA through adb?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
No, you can't sideload a U update.zip file to a device that has U1 firmware. If you want to convert from U1 to U, you have to use Odin
[Samsung Galaxy S10+ Guides, News, & Discussion] GMANNOT:
So using Odin 3.141 to go from u1 vzw to u verizon, you only need the userdata file for the flash correct? Or do all the files? With a factory reset of course.

Using a active vzw sim.

Im not trying to beat a dead horse here I just havnt seen a post (anywhere) for a sm-g715u1 to U post. Ive read this entire thread
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Incorrect
[Samsung Galaxy S10+ Guides, News, & Discussion] GMANNOT:
I edited my last post.

So i should add all the files then including userdata file.
[Samsung Galaxy S10+ Guides, News, & Discussion] GMANNOT:
I assumed that since the first 4 files were the same in both firmware versions i only needed to flash the userdata file for the carrier bloatware.

Thanks for correcting my assumption
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
No, they're not the same. If you truly have a SM-G715U, you're in the wrong forum. But it's always the same procedure for a U1-to-U flash, regardless of the model
[Samsung Galaxy S10+ Guides, News, & Discussion] GMANNOT:
I have a sm-g715u1 and want to go to sm-g715u. I was hoping the procedure was the same as this thread because it so thoroughly covers every flashing permutation possible. im running G715U1UEU7BUC3 and want to flash the vzw version G715USQU7BUC1. Both are the latest ota firmware. The sim is out of my old motoz vzw branded and is active and in the sm-g715u1.

So if the procedures are the same then reading this entire thread was worth it and i thank everyone for their time, effort and knowledge.
[Samsung Galaxy S10+ Guides, News, & Discussion] GMANNOT:
So i flashed the u version G715USQU7BUC1 to my U1 device and Odin showed a succesful flash with all 5 bl,ap, cp,csc and userdata. csc file was non home. However, I dont see any verizon apps installed. There were changes and it does show the U version software installed but no verizon apps. I saw no errors in odin and flashed it twice but no change. Not sure what i did wrong . I left the SD card in but dont think that matters.

It has verizon splash screen on startup but thats it.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
If it shows the splash screen, then you did it correctly. So I guess that's all it's going to give you
[Samsung Galaxy S10+ Guides, News, & Discussion] GMANNOT:
I didnt do a factory reset until the phone rebooted and i did it through phone software if that makes a difference. Nothing working that didnt already work. I did notice that it shut off ability to use dial pad for menus just like vzw phones.

Bad download? wrong version of Odin? Didnt factory reset before flash or before reboot?

Not sure......

Will be going back to U1 if this is all i get.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
This isn't the forum for your model so please take any further questions to the appropriate forum
[Samsung Galaxy S10+ Guides, News, & Discussion] bangdosa:
Hi. I'm also on the FUA4 on the Galaxy s10+ (g975U) with the U1 firmware installed. (it was originally Verizon)

I've also noticed the CSC code not changing (no popup with service provider update notice) last week when I was trying to go about changing the sim card from verizon to att/random korean sim..

I had to downgrade a few firmware and also flash the U version firmwares' home csc once or twice before going back to U1 home csc before CSC switching was reimplemented. I was hoping it was just a bug and let the phone take back all the otas, but checking once again now, shows that csc changing is not working once more. Hopefully this is a bug, and not something Samsung was meaning to do (since the s10 varient g973 doesnt seem to do this).

If you'd like, I'll sacrifice flashing again to figure out the exact steps needed to restore CSC code change implementation, and check on which firmware it broke, and whether it only breaks via ota, or flashing as well.

For the moment anyone on FUA4 or any bootloader 4 should not upgrade firmware to a newer bootloader incase they can't change csc anymore.

Here are summary of what I know at this time

S10+ G975U1

on latest firmware (FUA4 android 11)

- CSC change is not working.

- requires going back a few firmware, and flashing home csc from U variant firmware to restore csc change functionality.

- going back firmwares requires a factory reset (phone refuses to boot and goes to recovery mode, probably due to differences in android 11 and 10)

- resetting the settings app and clearing data while sim card is removed and plugging it back in at times seem to make a popup stating "new sim detected" with restart button, but csc does not change after reboot

s10 g973U1

on latest firmware (FUA4 android 11)

- CSC change works fine.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Bootloader 5 is finally available for U1 firmware, for those who have been waiting
[Samsung Galaxy S10+ Guides, News, & Discussion] PlutoDelic:
Any OTA zip by any chance?

Ps, is it 3.1, or just a security patch?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
No, there's no zip. And I have no idea if it's 3.1. I'm sure Samsung has the changelog posted somewhere though
[Samsung Galaxy S10+ Guides, News, & Discussion] PlutoDelic:
No official changelog yet

According to a Reddit post, it's 3.1 with March security patch level, which confirms the SamMobile output too.

Well, finaly.
[Samsung Galaxy S10+ Guides, News, & Discussion] PANQUEMAO:
In case it is useful to you.

Before last night by OTA in Spain.

Free of origin. I regret the language.
[Samsung Galaxy S10+ Guides, News, & Discussion] AnthonyX:
Hello!! I recently purchased a S10+ G975U, and I can't connect it by USB to my pc, so I can't update it. I want to manually update by SD card to see if the problem is solved. I need the baseband version 'G975USQU3DTC9' to do it. Is there anyone who have it to flash it? I'll apreciate a lots. Thanks!!

Or any solution to my usb-c port

I've tried every solution that I've found on web
[Samsung Galaxy S10+ Guides, News, & Discussion] Amosika:
I bought s10 5g last Monday. It's model is Tmobile SM-G977T. It came with android 10 and everything was working fine until I updated it to android 11 one ui 3.1. Now network is very slow, both Wi-Fi and data. I can't receive calls or make calls. Sometimes I have to dail up a number like 5 times before it connect. I tried to downgrade back to android 10 but I get auth error odin. Please help me. 🙏
[Samsung Galaxy S10+ Guides, News, & Discussion] danbest82:
Have you tried the "s10" forum? This is "s10+". Have you factory reset it? That's what tech support will tell you I'm sure.
[Samsung Galaxy S10+ Guides, News, & Discussion] Audaces:
Hi all,

I have an unlocked SM-G975U in Canada. Haven't managed to get the OTA to Android 11 yet so was looking to update with Odin. I'm pretty confused about which firmware version to download.

Looking under "Service provider SW ver.", I see:

SAOMC_SM-G975U_OYN_zaa-qq-0005

R38M407RMVB

XAA/XAA/ATT

So some googling has told me XAA is the unlocked/default variant, and the OYN means it's a multi-csc. But to be honest that doesn't mean much to me anymore. I was looking to download the firmware from here:

Latest Samsung Galaxy S10+ firmware

Download the latest Samsung firmware for Galaxy S10+ with model code SC-04L. Check out our free download or super fast premium options.

www.sammobile.com

But all the firmwares listed are for US carriers and not for my CSC. Which should I download? Is it not available for XAA yet?

Thanks.
[Samsung Galaxy S10+ Guides, News, & Discussion] PinkyFloyd:
When flashing firmware, what is the difference between using Odin and updating from SD card? Can I use the same file?

I have a Mac and setting up Odin seems quite complicated. I've flashed many phones via ADB before but this is my first Samsung. It just seems much simpler to flash from the built in ROM manager menu.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
1. Too many differences to name. Odin flashing and update.zip via SD are 2 totally completely different processes

2. Odin doesn't exist for Macs, that I'm aware of. You'd have to use Heimdall I think

3. You can't flash via ADB, unless you're talking about dd'ing each partition via root access

4. Built-in ROM manager menu? I have no idea what that means
[Samsung Galaxy S10+ Guides, News, & Discussion] PinkyFloyd:
dual post - delete
[Samsung Galaxy S10+ Guides, News, & Discussion] PinkyFloyd:
Ok thanksthat clarifies things. I have managed to get JOdin, (Java based Odin) working on my Mac and it can detect my S10+.

I have just got a new G975U (SPR) which I believe it's a US model, but I'm in the UK and it's not detecting any updates available. Current software is Android 10 with June 2020 security patch. I'm going to use JOdin to bring it up to date.

@iBowToAndroid - oops, by this I meant Stock Recovery.
[Samsung Galaxy S10+ Guides, News, & Discussion] PinkyFloyd:
Hey @iBowToAndroid , hope you can help. I've read as much of this thread as possible, but at 64 pages its possible that I've missed something - please forgive me if so. :)

I'm about to flash my SM-G975U but have a question about the CSC and exactly which file to flash. My current sw is G975USQS4DTF6 (Android 10, One UI 2.1, Security July 1 2020, BL v4) with CSC reported as XAA/XAA/SPR , which i understand means it was originally a Sprint phone but is now unlocked, right? There's no apparent Sprint bloat on the phone, and it works 100% on my Vodafone UK network, although I'm not getting any security updates.

Full sw details from *#1234# are:

AP G975USQS4DTF6

CP G975USQS4DTF6

CSC G975UOYN4DTF6

Model SM-G975U

I want to flash to get Android 11 and an up-to-date security patch, but when I flash I don't want any bloat on there, or risk loosing an existing feature, but looking at the files available on https://galaxyfirmware.com/model/SM-G975U/page-1 (and in your AFH repository) there doesn't appear to be an XAA tagged files in either the G975U sections. So my guess would be the closest to what i need is an SPR file, of which there is one available. But I suspect this will include a whole bunch of Sprint bloat i dont want. Could I just flash without the USERDATA file? Would that stop the bloat being copied across.?

Galaxy Firmware - Samsung Galaxy S10+ SM-G975U (SPR) | G975USQS5GUF1

This Firmware flash for Samsung Galaxy S10+ with the Phone Model Number SM-G975U for region 🇺🇸 United States with CSC code SPR and R(Android 11) OS.

galaxyfirmware.com

The other option seems to be to flash a U1 version with CSC XAA, This page has G975U1 with CSC as XAA.... But if i was to do this i think initially i could only flash a U1 with BL v4 (same as my current sw) , and then flash to U1-BL v5, right?

Galaxy Firmware

Download latest samsung firmware for free without any limits.

galaxyfirmware.com

Thanks in advance.
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
You can either flash v4 or go straight to v5
[Samsung Galaxy S10+ Guides, News, & Discussion] PinkyFloyd:
Thanks, going to U1 seems the best option, but as with most people, i'd rather not have to do a factory reset. If I want to stay on 975U could I just flash an Android 11 with a CSC of SPR without the USERDATA file? Would that stop the bloat being copied across?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
Yep. Just make sure to flash HOME instead of the regular CSC
[Samsung Galaxy S10+ Guides, News, & Discussion] PinkyFloyd:
Hey @iBowToAndroid just to give you an update... I tried JOdin3 on my Mac and couldn't get it to work at all. Errors in decompiling files. I remembered I had an old XP laptop in the attic so got it down and started it up ok. Installed Odin 3 patched ok and managed to flash a G975U Android 11 system with July 21 security patch first time. So now running it on my S10+ and it's buttery smooth. At the next security patch I'll maybe try the U1. Thanks for all the help.
[Samsung Galaxy S10+ Guides, News, & Discussion] schwinn8:
I'm planning to convert from G975U1 to U-Verizon because I need the VVM (visual voicemail app) as I can't seem to get it any other way. (If anyone has a better idea for this, I'm all ears!)

According to Sammobile (https://www.sammobile.com/samsung/galaxy-s10-plus/firmware/SM-G975U1/VZW/#SM-G975U1) there is a newer version ROM available for the U1, and this is also VZW capable? This confuses me because I thought U1 was unbranded (there's no USERDATA in the U1 download) so I'm not sure how there can be a "VZW" version of the ROM at all?

Does this mean I should follow the steps as usual (per post #25), apply the U-Verizon to get the USERDATA (and VVM app), boot and configure as desired, and then install the AP,BL, CP, and HOME-CSC to update the ROM to the newer version (while keeping the old USERDATA and VVM app)?
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
1. The VVM app might be available for download in the Play Store

2. It doesn't matter what the latest version of U1 is, since you're not going to be flashing U1
[Samsung Galaxy S10+ Guides, News, & Discussion] schwinn8:
VZ VVM is not available on the play store... at least I can't find it. I tried a few other generic apps, and none seem to be able to communicate to the server. I also tried pulling the APK from another user on the VZ ROM, and that won't connect either... just says it's "trying to connect" and to check back in a few minutes, but it never succeeds (been a few days). I will get on the phone with TW (total wireless, the MVNO we're using for VZ tower service).

Unfortunately, I followed the instructions which say to flash U1 first. But, I screwed up and got a v6 BL by mistake, flashed that (as instructed) and now I'm on BL6 and can't load the BL5 VZW U-ROM. And there's no V6 VZW ROM yet. DAMNIT! My mistake, of course, but very annoying. I'll live with it.

Still, the question is open, why does SamMobile say there is a "VZW" U1 rom at all?

Secondly, if I had the VZW U ROM, can I apply the U1 updates (as they are newer)? I'm guessing we should not do that...
[Samsung Galaxy S10+ Guides, News, & Discussion] iBowToAndroid:
1. If you're on an MVNO, I'm 99% sure a Verizon-specific app won't work for you. It's designed to connect through their systems and servers, not the MVNO's.

2. Even though U1 doesn't have any bloatware, it does customize some settings and other enhancements according to the SIM card that's inserted, for best performance. The default CSC for U1 firmware (with no customizations) is XAA, but Samsung also releases the U1 firmware for each carrier, with the optimizations already included. I'm not sure why, since the firmware just converts itself automatically anyways, when the SIM is changed. But that's why if you look on SamMobile and other such sites, you'll see a U1 version for each of the carriers/CSCs that Samsung has firmware for, for that specific model
[Samsung Galaxy S10+ Guides, News, & Discussion] schwinn8:
You are correct... the problem is that my wife's phone never reregistered the proper CSC. It thinks it's on TMB when it should be TFN (or VZW). I just setup "my" phone and it came up properly... and what do you know, there's a voicemail app there. So, this means I need to fix the wife's phone (FDR and then have it rerecognize the SIM and switch to TFN).

Also, I discovered that I wasn't FULLY to blame for the BLv6 flash on my phone. I used SamFirm to download the firmware, and even though I put in info for the v5, it gave me the LATEST v6 firmware. Granted, I could have checked deeper, but WTF. I'm now looking for a way to download the v5 BL file for my wife's phone... is there a way to do this on SamFirm (I'm using the "reborn" version)... or do I need a different tool to get that?

EDIT, I guess I don't need to download an older FW... as her phone is already on GUF2 (which is what I wanted to DL). So, an FDR and re-sync with the SIM should work. Ignore my question and thanks for the help! I should be all set!