yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
So you're still running U1 firmware but with the U CSC flashed to it?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] stealthj:
Now I completely flashed the tmo original firmware because I'm using one of those 3rd party websites that remotely log into your computer to SIM unlock your device.

The guy ran into errors and had me re flash the factory firmware. Waiting on results now.

Did I mess something up?

I received the phone yesterday in the mail and even before powering it on, i flashed the u1 firmware.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
I have no idea if you messed something up. Or maybe it was the guy doing the work. There are lots of amateurs out there who claim to be able to do it. But the true professionals who know how to do it correctly without messing anything up are much fewer and harder to find. For example, at the business that I own, we can unlock it even if it has U1 firmware on it
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] stealthj:
I would really appreciate it and would rather give my $$ to a professional like you if you would be so kind and pm me your info?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] x1tymez:
It's really debate. I can think of one is Carrier aggregation. Each carriers firmware is build differently to take advantage of their network. Most users buy the unlock and flash their carriers firmware on it, some don't really care.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] satpakCA:
I’ve a US unlocked Samsung S20. How can I get the esim option enabled? If I flash firmware, would it be possible?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Geekser:
ATD1 firmware with May 1 Security Patch for G988U1 can be downloaded now via Frija - I am on ATT and don't want to lose WIFI Calling (which always goes away when I try to flash G988U1 firmware) so this time, I flashed Bootloader, AP and CP files from the ATD1 firmware and the Home CSC file from the G988U ATCT April Firmware.

I am pleased to say that everything flashed nicely, no issues and now I will play around with it to see what sort of improvements Samsung inclkuded. (I thought I read that more camera improvements were coming - hoping to see those and whatever else they included) :)
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] le0.br4zuc4:
I just got ATD1 with May 1 Security patch on my VZW but I flashed U1 firmware. Do you know difference between ATD1 and ATD3.?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] mopartonyg:
Not seeing ADT3 anywhere on Frija, how did you download it?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Geekser:
appologies - I was going on memory - I flashed ATD1 not ATD3 (I had the other won in mind because I had been reading another thread where it was mentinoed - I got confused and used the wrong digit - 3 instead of 1 - sorry about that - didn't mean to cause any confusion.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] mopartonyg:
No worries and no confusion, just making sure I am doing the right thing. Thanks for your input and response.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] betovanbuuren:
I have an unlocked G988U S20 ultra from spring, and flashed ATD1 U1 firmware, so everything is working correctly, just the caller id & antispam option is greyed out.

Since im using it in ATT Mexico, do you think that if i flash the home CSC file from the G988U (spring version or should i try another?) ATCT firmware this feature would be enabled?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] aamir123:
I tried to this here for the same reasons. Afterwards, when I put my Tmobile sim into the slot the carrier settings pop up does not occur and I am also not able to perform OTA updates.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
If you flashed T-Mobile firmware and you have all of their bloatware, then no, you won't get that popup. It's already set to T-Mobile, so there's nothing to change
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] aamir123:
I didn't get any of the T-Mobile bloat. I also broke ota in the process.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
Well if you're trying to get T-Mobile U firmware and bloatware, something went wrong somewhere. So start over by flashing U1 and then going through the rest of the steps
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] aamir123:
I did this today.

I flashed the full U1 firmware. (BL, AP, CP, CSC, and Userdata)

Then I rebooted and went through the setup process

Then I rebooted back into download mode

I flashed the Tmobile US Firmware (older fw TBN) (BL, AP, CP, CSC, and Userdata).

After reboot I again went through the setup process.

Still no bloat, still no updates.

Sim was left in the phone throughout the process. I have tried without as well and did not get different results.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
1. There is no USERDATA for U1 firmware. If you're flashing a USERDATA when you flash U1, then I have no idea what that file is or where you got it from, but you shouldn't be flashing it.

2. You're missing a key step. Review the instructions again
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Geekser:
I am sorry but I really don't know - you coul.d try it to see if it works - and if it doesn;t just flash the original firmware back to the phone....goood luck
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] wirelessrevolution:
if the flash fails, how do you revert back to a working ROM?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
If you mean that it fails part-way through and won't boot to anything but an error screen, the only way to revert is to complete a full flash successfully
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] wirelessrevolution:
I’m new to flashing a rom. Can you link me to a reliable guide?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
If by "rom", you're referring to standard official factory Samsung firmware, there are ton's of "beginner's guide to Odin flashing"-type posts here on XDA
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] wirelessrevolution:
I found a guide and downloaded Odin 3.1.3

I got the stock rom G981U1_TAY_1.zip from SamMobile

I downloaded the Samsung USB drivers and restarted my PC

then made my phone into Download mode

then Launched Odin 3.1.3

then connected the USB cable

Odin detected the phone n 0:[COM3]

I selected BL, AP, CP and CSC then clicked started and waited 10 minutes and it failed.

The message in Odin is

Complete(Write) operation failed.

Model	SM-G981U1
Model name	Galaxy S20
Country

Version	Android 10
Changelist	18334340
Build date	Fri, 27 Mar 2020 10:07:59 +0000
Security Patch Level	2020-04-01
Product code	USC
PDA	G981U1UEU1ATCT
CSC	G981U1OYM1ATCT
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
We need to know/see the full Odin log, in order to correctly diagnose the issue. Also need to know/see any error messages that appeared on the phone itself, up in the upper left under all of the phone details
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
That's like 5 different flashes. And I can't really tell where each one starts and ends.

After any failed flash, the phone needs to be rebooted back into Download mode in order to try again - you can't just click on Start again.

SHA256 errors means you're using the wrong version of Odin. You need the Patched version
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] wirelessrevolution:
I got 3.1.3 what is the patched version? that happened once but I posted my 2nd attempt and it was the error I was talking about Write Failed
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] mopartonyg:
The third post in this thread has a link to the correct patched odin.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] wirelessrevolution:
<ID:0/003> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<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:0/003> Odin engine v(ID:3.1301)..
<ID:0/003> File analysis..
<ID:0/003> Total Binary size: 8664 M
<ID:0/003> SetupConnection..
<ID:0/003> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)

It still failed with Odin 3.1.3 Patched (https://xdaforums.com/s10-plus/how-to/sm-g975u-firmware-downloads-tmo-spr-att-t3908657)
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
SetupConnection is a USB issue. Need to try a different port, different cable, or different computer. Or sometimes, how you boot to Download has an effect. So try a method that you didn't use before
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] wirelessrevolution:
I am using a Thunderbolt 3 cable. I tried two Windows PC’s and a Mac (with Boot Camp).

I only know one way to boot to Download. Volume Up and Side Key.

What other ways are there?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
I can pretty much guarantee that it's the cable.

It's Volume Down, not Volume Up. But the other ways are "adb reboot download" from the OS and "reboot bootloader" from Recovery mode
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] wirelessrevolution:
You're right. I got a OnePlus USB C to USB-A cable and it worked.

I've been doing this to get to Download mode

Turn off phone

Press Volume Up and Side Key (until Samsung screen)

then press the side key (blue screen appears with some text on top left and bar code appears on lower right and Download in the center)
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
Volume Up has always been used to get to Recovery mode on Samsung devices, and Volume Down has always been used to get to Download mode. But on newer devices, holding both Volume buttons while plugging in the cable usually works too
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] rainbow99:
sorry for the noob question. i have a t-mobile S20plus, but already spend time to setup. Is there anyway i can flash to the unbrand firmware without losing data? I'm lost about the CSC thingy. thanks.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
No. A factory reset is always required when switching between U and U1. There are like half a dozen different ways to backup and restore your data - it's really a pretty easy process, these days
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] rainbow99:
Ok thanks, sir
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] d_ganggreen:
I have an unlocked U1 ultra and am wanting to put the new T-mobile firmware on it (I use t-mobile for my service). Can I directly use the tmobile one while loading the correct CSC, or do I need to use U1 XAA first?

What I mean, is can I just do a factory reset from the phone itself...then use odin to flash the tmobile U firmware?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
You don't need to do a reset. One will be performed automatically when you flash U firmware
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] d_ganggreen:
So I can just download the U firmware and go straight to that? Thanks in advance.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
Yep
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] d_ganggreen:
Sweet, thanks. Just did it and was greeted by the t-mobile boot screen. That is a good sign. I am setting up now and will load my backup and post back if anytyhing is off, or if it is a success.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] SilverSusano:
Rooting Tmobile S20

Just to clarify, will this effectively root the S20? I just bought one, but so far I have found nothing for Qualcomm rooting.

I have the baseband G981USQUATAW; Knox 3.5 and security MDF 3.1 release 5

SMR Feb 2020 Release 1

Thank you!
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] d_ganggreen:
No this will not root. The only reason I am going away from stock Samsung to stock t-mobile, is to get the RCS chat features in the native messaging app. I can confirm that all features work with mine and running smooth. I am only on t-mobile so I don't mind the added software they include.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] SilverSusano:
Rooting Tmobile S20

Is there any efforts being made to find a root method for the S20, or the Plus and Ultra? Thank you.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
I'm sure there are - but not in this thread. And don't expect there to be any progress/success. Finding any root exploit for a Samsung flagship with a locked bootloader is basically a miracle these days
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Stank0:
Chat features was available on U1 too (in google messages).

If you used HOME CSC in odin, you wouldn't have to restore/set up anything.

I only flashed U on my U1 because the newest ATE6 is not available for U1 yet and I will flash back to U1 immediately when it becomes available. There is no other benefit from running T-Mobile software on an unlocked phone besides that. Actually quite the opposite. It seems that the Smart caller ID (incoming) doesn't work on it and it says it's incompatible when you check for software update in settings.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] d_ganggreen:
I have had the opposite experience. My ID is working and now my visual voicemail is running perfect as well. I used to get multiple errors. I know that google messenger worked, but I prefer the stock one as I use the categories, customized background, and full easy integration with my samsung watch. I couldn't be happier now. My only question is if the June security update comes out for the U1 first, is there a way to flash that to my phone but keep all the t-mobile stuff as it is now? Also, I don't have any software update errors either.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Stank0:
Oh, I see. We all have different preferences and that's okay. Although I'm not sure what do you mean by full integration with your Samsung watch. I've got S Gear 3 and Google messages shows texts on my watch just fine. Am I missing on something here?

AFAIK you can't mix and match software versions in Odin, but I might be wrong. I wouldn't want to be first to try though because this phone would make way too expensive paperweight.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Stank0:
I need to retract my previous statement that there are no benefits in U firmware over U1.

I flashed it again and this time with full wipe. This time I don't have any problems with the OTA update check, I've gotten a native video call (only DUO in U1) and the camera feels much better although I noticed it heats up pretty quickly.

There are other things that worked in U1, but now they feel more native or integrated if you will.

I'm quite happy with ATE6 now although there is a new ATE4 for U1 and I have to fight the temptation :D
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
TE4 is older than TE6, not newer than TE6
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Stank0:
Yet, it was JUST released -i.e. newest for U1

Edit: Some people claim it has better camera fixes than TE6, but might be placebo effect since the changelog does't say anything else besides June security update. Though... who knows? It wouldn't be a first time changes and fixes weren't listed in changelog.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
You clearly don't know anything about Samsung's naming system, for their build numbers. When it comes to the letters and numbers, A is older than B, and 1 is older than 2.

So T is newer than S, and 6 is newer than 4. Go look on SamMobile right now - all they have is TE4 and no TE6. That's because they haven't added the TE6 files yet - because TE6 is newer
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Stank0:
I don't know how to put it so you'd understand... Let me try this way.

ATE6 (for U) was released 5.22.20

ATE4 (for U1) was released 5.31.20

See what I mean? The "older" firmware was released AFTER the "newer" one.

Yes, if you go on Sammobile, all they have is ATE4. FOR U1

And ATE6 FOR U
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
Release date means nothing.

Samsung names them based on the date that they are compiled, built, and approved. Therefore TE6 was approved after TE4, and is technically the "newer" version.

This doesn't matter anyways - it's pointless to argue.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Stank0:
I agree. I was just trying to point out that some people claim their cameras do better on ATE4 than on ATE6 and I'm tempted to verify their claims although I'm quite happy with how the camera works on ATE6, but there is always room for improvement, isn't it? ;)
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] ZeroBarrier:
Do you mean the visual voicemail app or do you have visual voicemail in dialer?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] jawa7400:
Unable to perform OTA updates

So I picked up an unlocked s20 that was originally used on TMB. I am using an ATT SIM because that's my provider. Everything works fine but I am unable to perform OTA updates. It says current software version isn't supported. Contact service center.. How can I fix this? Here's what I'm running:

One UI version

2.1

Android version

10

Baseband version

G981USQU1ATAW

Kernel version

4.19.81-18334340

#1 Fri Mar 27 21:32:22 KST 2020

Build number

QP1A.190711.020.G981USQU1ATCU

SE for Android status

Enforcing

SEPF_SM-G981U_10_0012

Fri Mar 27 21:23:41 2020

Knox version

Knox 3.5

Knox API level 31

TIMA 4.1.0

DualDAR 1.2.0

HDM 1.0 - F

Service provider SW ver.

SAOMC_SM-G981U_OYN_TMB_QQ_0031

RFCN105NA7L

TMB/TMB/XAA

If I flashed the U1 firmware would that take care of it?

I've never tried this before so like other posts I've read I obviously just want to make sure.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
It says your version is unsupported because your Baseband doesn't match the Build Number. Download the TCU firmware and flash only the CP - that will restore the original Baseband Version. Then OTAs might work
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] jawa7400:
Thanks for the reply. I'm not sure where to find the TCU firmware.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
I'm not sure. You can try doing a Google search
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] renton82:
Today while i was using odin to flash an update connection is stopped and update got stuck in the middle.

Restarted pc and phone, i tried to flash again firmware with odin even if phone was stuck on "use emergency procedure with smart switch ecc..." . Now phone bootted up but download mode is missing, i can only load recovery mode but if i try to reboot to bootloader it remains stuck with a red writing "entering fastboot mode" but it remains stuck! Is there a way to flash again entire firmware in recovery mode?

Thank you!

---------- Post added at 07:33 PM ---------- Previous post was at 07:32 PM ----------

Odin doesn't recognise phone anymore! Can a factory reset help?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
Only via an update.zip, which I doubt will work in this situation
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] renton82:
Just done a factory reset but it's the same thing

---------- Post added at 07:56 PM ---------- Previous post was at 07:52 PM ----------

So i have no other way to recovery my phone?

---------- Post added at 08:19 PM ---------- Previous post was at 07:56 PM ----------

Sorry wrong thread i have a G988B...
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
You'll have to contact Samsung for assistance
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] lunarken:
may i know, whats the latest firmware for 988u.

mine is a verizon set.. n april patch is the latest?
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] bsilvertab:
I just picked up an S20 5G from swappa that has ATT firmware loaded onto it, but I'm currently using it on Verizon. RCS and Wifi Calling don't work. Technically Verizon didn't offer this phone since it doesn't include Mmwave 5g. If I try to flash this phone with the U1 version of the software is there any home to get RCS and Wifi calling? Also, the phone as of right now (on U firmware) will not update. I'm stuck on a March security patch.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] bsilvertab:
Second question: Going from a U to U1- do I still need to flash the original U1 firmware package... or just download the U1 firmware from Frija and flash that? (because it is up to date)
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
1. You might get RCS and wifi calling by flashing the USERDATA along with the U1 firmware

2. You can flash any version that you want - so you can go straight to the newest/latest if desired
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] bsilvertab:
Flashing the U1 firmware then inserting the VZW sim card seems to have done it. Wifi calling is back.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Ripmett:
xx
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] craniumb0x:
I have been playing with different firmwares and have a question. I want to revert back to SM-988U1 in my s20 Ultra, how can I do that and get rid of the ATT software that I flashed onto it with the USERDATAS file
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] illiterateBuffoon:
I'm not understanding, I just received the S20 Sprint locked from eBay, if I flash the unlocked firmware does that unlock my device to use any carrier? Or is that a different thing.
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
The answer has already been given in the OP and extensively discussed in the thread

No, flashing firmware will never magically SIM unlock a phone. Performing a SIM unlock goes much deeper than that. I can provide a recommendation for a professional 3rd party unlocking solution if you need one
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Nightwind Hawk:
Hi, I have a question regarding my US unlocked SM-981U1 being used with T-Mobile. The recent update I've seen through screenshots "Enable standalone 5G."

Will I receive this feature with the stock firmware of SM-981U1 or do I need to transfer over to SM-981U to receive this function? I'm confused at this point because the new firmware seems to be on sammobile for SM-981U1, but the Samsung website does not show that there is any update.

U1 page: https://doc.samsungmobile.com/SM-G981U1/TMB/doc.html

U page: https://doc.samsungmobile.com/SM-G981U/TMB/doc.html

Any clarification is appreciated! Thank you!!
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] iBowToAndroid:
At this point, it doesn't matter because the TGL update got pulled. It's no longer available
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] hofopds:
Doh! I have the TGL update, and actually got SA to register for the first time yesterday. Best data speeds I've seen from T-Mo in the lower level of my rebar faraday cage house on SA n71 (about 45-55 down, normally it is 10-20 with 12/66/2 LTE CA) [emoji1787]

You will eventually get the same modem updates on U1, but they seem to be a month or more delayed from when T-Mobile pushes them out. I actually switched from a U1 device to T-Mobile firmware because I was tired of waiting for all the 5G tweaks to get pushed to me :)
[Samsung Galaxy S20 / S20+ / S20 Ultra Guides, News] Jason928591:
Please delete