yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Venom0642:
Did you try resetting the mobile network Access Point name that should be AT&T if got a AT&T sim card on it.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] supurman182:
Well it seemed to connect to the att network automatically. The APN it connected to was NXTGENPHONE.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rjohnstone:
That is the old LTE APN. The current AT&T APN for 5G capable phones is enhancedphone
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] supurman182:
It does not give me an option for that apn. Do I have to do it manually?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rjohnstone:
Actually that would depend on your service plan with AT&T. If you're on one that has 5G service, then yes, the "enhancedphone" APN should show up automatically.

I know when I was on the NEXTGENPHONE APN, I had all kinds of issues with text messages failing.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] supurman182:
Hmmm bootloader 2. Do you think it would be best to flash something earlier just in case?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Amirgod802:
So I know it's been asked here in different variations lots of times, I've read the entire thread, but my OCD won't chill and I'd appreciate some help with my noob scenario;

I got an unlocked ATT/ATT/ATT Device,

I'm not using an American carrier anymore as I moved - got no interest in specific carrier apps.

Flashed the recent U1 file as I figured I can roll back to BL 2, so now I'm XAA/XAA/ATT.

Only thing that bothers me is - Will I get OTA's in this form, or should I go back to ATT/ATT/ATT?

Rather have bloatware disabled than be anxious about updates tbh.

Also, is there a problem going back to U (BL2, of course) with no AT&T Sim? I'm carrier unlocked (U).

Whoever answers, I'm grateful in advance, and thankful for this thread 🙏
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] supurman182:
So I flashed my t-mobile phone to 2DUBB firmware to use on att but it still has all the tmobile apps and the t-mobile boot. Also I can't receive text messages
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Nettwerk:
Yes you will get OTA. I have imported Note 20 Ultra unlocked ATT as well. I flashed U1 fiemware so now I have XAA/XAA/ATT and no problems with OTA. I have latest OTA installed witch includes March security patch.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rskyline:
I just flashed the latest U1 build to my ATT U, and it flashed correctly, I got the unlocked version features like the integrated spam call blocker. Now in settings it still shows ATT/ATT/ATT, did I make something wrong? I wanted to get the full unlocked experience and just use the att network. Also I'm seeing that my 5G icon is the ATT branded one.. So I'm kinda confused. Flashed the csc partition and not the home csc.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] znel52:
Anybody happen to have the N986USQU2DUC5 build for Verizon? It is the latest march security patch and is upgraded to Bootloader 2. The only site I was able to find it on was 'samfrew'. Site looked kinda sketchy and the download was going to take like 11 hours without a subscription.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rjohnstone:
That's normal.

Mine did the same thing. I changed the CSC to XAA and flashed U1 software.

On first boot it was XAA/XAA/ATT and on second boot, after inserting my AT&T SIM, it switched back to ATT/ATT/ATT, but I got all the U1 features and no AT&T bloat.

The 5G icon you see is because the AT&T SIM is still dictating network info, including CSC specific carrier icons.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rskyline:
Make sense. Yeah everything else looks okay and I got the unlocked features as well. So all good then.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
I'll take a look for it later today
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] znel52:
Hey nevermind it is up on SamFW today. Thanks for the help though!
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Uploading VZW 2DUC5 to AFH now. MAN these files are getting bigger and bigger. This one is 7.0GB!!
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] sintboy2020:
i have att@t note 20 ultra with latest march update can i chane the firmware to U1 usa unlocked version .i tried but patching failed
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] supurman182:
Flashed my t-mobile phone to DUBB firmware. This, along with my att sim didn't change the carrier software. It is still TMB/TMB/TMB

I tried the Google dialer thing but that no longer works. It didn't pop up the csc change menu.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] warriorvibhu:
Not sure if someone already answered this and sorry to all my amazing friends here that i am not able to be online as often. Hope you all are doing well.

So your ATT/ATT/ATT lets represent it as 1/2/3 - Now /3 is something you can not change - so if you bought from ATT it will be 1/2/ATT if from T-mob it will be 1/2/TMB - So that always remains same.

for 1/2 it depends on the sim card you insert, it seems you are using ATT sim. I have unlocked version so my /3=/XAA , as stated above it remains same regardless of sim i insert, and i am using TMB so my 1/2 = TMB/TMB if i was using ATT it would look like ATT/ATT/XAA. Hope this answers your question.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Finally got DUC5 link in post 2, AFH was having issues
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] sean8102:
I've gone back and forth between U and U1 on the S10+ I bought from AT&T many times. But it seems things are just a little more complicated so I'm a bit nervous about pulling the trigger.

Got my Note 20 Ultra from AT&T yesterday (poor S10+ went into the ocean while on vacation in Gulf Shores). Anyways, at the time I last had my S10+ it was running the U1 firmware.

When it got the Android 11 update it got support for Wi-Fi calling on AT&T! It just showed up in the connection settings and worked perfectly.

I'm wondering if that's the case with the Note 20 Ultra running U1 firmware since the Android 11 update. If it also got Wi-Fi calling support on AT&T. Also when my S10+ was running the U1 firmware it got firmware updates from Samsung, will that still be the case if I flash my Note 20 Ultra I bought from AT&T with the U1 firmware ?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rskyline:
I have wifi calling setting on u1 on my att with u1 firmware, however I haven't tested it since I keep that off all the time.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Do you see any difference in the cell coverage in your area between the U and U1 firmware? I'm bored and feel like flashing the U1 ;)
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Ok, so I did get really bored and flashed U1. To be 100% honest if you put the device in front of me with Carrier/Unlocked firmware, I couldn't tell the difference. Aside from the bootscreen animations and actually looking in the actual firmware revision I genuinely can't tell ANY difference.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] neowar3020:
Hello everyone, i am a little confused, i have bought the note 20 ultra snapdragon here in México using it with Telcel, the model it appears it is the SM-N986U, but it also says it is XAA/XAA/ATT, i dont know wich firmware version i should install, since ive read that the xaa is the unlocked one but it doesnt match with the model U, it says it is for the U1, any help?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
You can flash ANY of the firmware on this thread. The only exceptions you are going to run into are the ones that are around the Bootloader 1 vs Bootloader 2. If your device is on bootloader 1, you CAN go to a Bootloader 2 firmware, but you cannot go the other way. Once on 2 you stay on 2
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] sean8102:
Just wanted to say I flashed the U1 firmware on my AT&T Note 20 Ultra. Worked perfectly. I have Wi-Fi calling, HD voice, visual voice mail etc. Only thing I don't have is "AT&T Enhanced Messaging" but since they currently don't interconnect with any other carriers I couldn't care less about that.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] warriorvibhu:
Glad you called it out, I am sure others may have called out earlier I am not trying to take anything away from them. I did a mistake by oversight i didnt read the whole name of new firmware and now i am on bootloader 2.

Anyone else facing constant phone crashes/restarts when opening camera ?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Before I went to U1(OK, I was bored) 😊

I was seeing the camera lock up when I did the double power button press and an odd reboot too
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] warriorvibhu:
Still happening to me. I always have been on U1. Let me try the usual clear cache thing.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
BTW, I did a clean install when I jumped to U1
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] warriorvibhu:
Ahh that might have done it. I am surprised why there isnt much noise related to the Camera restarts. i think its highly unacceptable considering the moment is long long long gone if your phone restarts when opening camera. Samsun should take that seriously.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Uploading U1-2DUC8 April Security Patch, will have a link shortly in Post #3 (no it isnt an April Fools Day joke ;) )

My AT&T device just updated. 250mb patch
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] truckerdewd:
I wish T-Mobile would drop the newest update.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
For the U1 firmware they are all aligned with the same revision numbers

(Not so much with the carrier versions though)
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] dj24:
I keep hearing that the U1 which has Samsung's spam call blocking feature is much better compared to the usual carrier's U devices. Have you noticed any difference? I have the t-mobile U version and I'm just getting inundated and this is after enabling their scam ID and Scam Block additional version on top of their built in feature.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
So I cant really say one is better than the other or not. I seem to get a few calls that come through on the U1 version at maybe about the same rate as AT&T's.

I can say that Samsung's is "Powered by" Hiya, and there is a Call Blocker app on the Playstore if you want to give that one a shot. I suspect it would be pretty comparable to the one built into the U1 firmware
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Venom0642:
I use the AT&T Call Protect Pro one for my AT&T Carrier no spam at all goes thru , this is the one i use part of my unlimited data plan

AT&T Call Protect - Apps on Google Play

More control, less spam calls.

play.google.com
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] butchieboy:
Got bored and got an A71 5g
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] toskabab:
Try Hiya or Sync.me from the playstore. Sync.me has a lot more features and as long as you're using an ad blocker of some sort, I've never found the need to upgrade to the paid version.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rjohnstone:
AT&T Call Protect is "Powered by Hiya" as well. I found it pretty useless. You have to go with the Pro option for it to really work right.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] butchieboy:
Hey Venom when you get a chance check PM
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Venom0642:
Will see what i can do , right now I'm at work no days off for the last 2 months working 75 hrs a week.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Venom0642:
Check your pm i have it.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] butchieboy:
Big shout out to Venom for his help. I really appreciate it
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] butchieboy:
Well Kangi...I guess this means I can no longer beat up on Venom. He really came through for me...can you take over for me..🤣😂
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] sclarktay4:
Has anyone tried to go from DUC8 of U1 back to any bootloader 2 version of U? Mine wont boot. Goes to Android recovery to try again.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] ShoonMcgregor:
I just did, I needed to do a Factory Reset from the recovery menu
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
In addition to the factory reset, make sure you're flashing the Bootloader 2 - U firmware from post #2
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] sclarktay4:
I am on DUC8 on U1. I tried to go back to DUC1 and DUC5 for U. Both are bootloader 2. They were also dirty flashes since I am too lazy to reinstall all my crap. Both took me to android recovery, so I am thinking it will only work if I do a clean install. Had no problem with dirty flashes until now.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
I think the dirty flashing to/from U and U1 can not go so well sometimes
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] sclarktay4:
I have been dirty flashing back and forth for a little while. Seems it only became a problem to dirty flash with bootloader 2. Oh well, thats what I get for being lazy. Thank you guys for the responses @kangi26, @ShoonMcgregor
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] dj24:
Can someone explain to this noob the difference between dirty flashing and a clean install?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
A clean install is when you Odin flash with the CSC (NOT the HOME_CSC) or USERDATA files, those cause your device to wipe, or you do a Factory Reset before flashing. A dirty flash is flashing a firmware without allowing the device to factory reset (Wipe).

IMO......

I typically recommend if you're going from the "last" firmware to the most current, and dirty flash is ok. It's an incremental update.

If you're going from a firmware that's "older" or to/from a U/U1 firmware that you allow the device to wipe, there can be some significant differences that could eventually cause instabilities
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Venom0642:
N986USQU2DUCA , This firmware is out for comcast and Xfinity April Patch , not gonna odin will wait for AT&T just thought i give heads up.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Thanks for the heads up venom, I'll get a link in a little bit
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Link for 2DUCA is posted
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] butchieboy:
Any time I have ever went U to U1 or U1 back to U I have always had to factory reset. Usually the 1st install would always fail...not immediately recovery and boot would flash then at about 90% it would fail. So for me, and this is just me a clean install has always been best..but to each their own. I'm kinda OCD..lol after a install I use the hell out of the device until about 20% left on battery..boot to stock recovery do a cache wipe then start my first charging cycle..lol I have issues I know.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] xtravbx:
Same. You ever get this figured out?

Something wrong with tmobile unlocked devices. It's like it's not really unlocked.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] supurman182:
Unfortunately the sim card is not changing anything and i think it's messing with my incoming text. I've have had phones that will change all the software upon inserting new sims this is not the case. A friend of mine was able to change her to verizon using the Google dialer trick but this no longer works
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] supurman182:
I am clueless. The only thing I can think of is flashing back to the out of the box firmware and trying the Google dialer trick. I don't think I can test my theory because I'm on bootloader 2 now. All I know is the Google dialer way worked right out of the box but it no longer works (on the Google dialer enter: *#*#27262826#*#*)
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] xtravbx:
Yeah you won't be able to flash back and get the dialer to work. I tried.

I sent my phone in to Samsung over it, because it was."permanently unlocked" by T-Mobile (I could verify this in the settings and screenshots I took during the unlock code process etc).

I'll let you know what happens when I receive jt back on Monday. I doubt much.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] dottat:
Does anyone else hate what this new app has done to threads like these?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
I've actually stayed using the web version
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] dottat:
Yeah I just had to switch back to it just to see your firmware post in #2. Freaking app is unusable still at this point and I can't believe they did this to a mobile phone based site.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] dottat:
Does anyone capture the regular ota zip files these days?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] jameztownbarber:
Hey I've got a Unlocked Verizon N20 Ultra, I'm using Boost Mobile, now that TMobile bought sprint my service is pretty good but I wanted to flash to either sprint or Tmobile firmware....Would that b possible? Thanks
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] butchieboy:
I did with http canary a few builds ago. And yes this app is freaking horrible unless you use web based like Kangi said
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] dj24:
Has T-mobile actually pushed anything since the Feb 1 update? I don't ever remember them being this late..
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] ShoonMcgregor:
No recent updates, perhaps the bootloader 2 change is causing the slowdown in qa
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Uploading N986U1UEU2DUCB now, hope to have a link in post #3 soon
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] jameztownbarber:
I've got a Verizon n20ultra on

Baseband

N986USQU2DUC5...wat firmware should I flash from u1...thanks guys been a awhile just came home from doing 5...so trying to catch up things have changed...
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Sorry, my brain is a bit mushy, are you wanting to go TO U1? or coming back from U1?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] pimpmaneaton:
Sounds like you are trying to flash to a u1 firmware. If that is the case you are currently on a bootloader v2 firmware, which means you will need to stay with a u1 firmware with that as well.

In the 3rd post can see where the bootloader v2 started, so can flash anything from that point and newer.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] jameztownbarber:
Ok, so I can flash a u1 firmware aslong as it's b2...thanks man
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rwd0530:
Hello all,

I'm currently running N986USQS1CTLC on my unlocked Note20 Ultra. Is there any issues with upgrading to N986USQU2DUC5? I understand that I will be going from a v1 BL to a v2 and there's no turning back to a v1 BL so I want to be sure.

Also, can I do a dirty update or will I need to do a clean?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
There should be no issues for you to go to the latest. I would absolutely do a clean install though
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rwd0530:
Thanks for the quick reply.....

I've seen in some recent posts about the U1 v2 BL firmware experiencing constant phone crashes/restarts when opening camera? Do you know if this issues is happening in the N986USQU2DUC5 firmware?
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
You're welcome

I think it might have been on the U firmware. I'm now on U1 and am not having any of those issues
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Shaun9575:
Does it matter which one i download and use or not really??

Im sorry if im asking this question, im just too new for these kind of stuff.

Thank you
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
"Sort of"

If your device is currently on a bootloader 2 firmware, you can not flash a bootloader 1 firmware. Aside from that, it doesn't matter. Typically I'd recommend flashing the most current one. It'll have the latest security patches.

Edit** BTW the top most ones are the latest
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rwd0530:
Reading a post from warriorvibhu (post #1,687) he says the camera crashes is happening to him and he's always have been on U1. Then again I also see your response about before going to U1 you were experiencing the camera crashes. So it's happening on U and U1? Thinking I might hold off for a little while to see if the camera issue gets sorted out before going through the effort of a clean install.

The phone that I would be flashing is my work phone so when I do a wipe breaks my corporate Multi-factor authentication (MFA) connectivity and MDM certs which requires me to engage IT to manually reset my MFA account / MDM certs as it some how detected that I wiped my phone. Anyway it's a lot more effort then the norm.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Oh I feel you there, it breaks my MFA too. 😕

I jumped to U1 for the first time in a really long time and have zero issues with it. Historically I would get a little worse cell coverage, but that's not an issue any more. I do think the updates are more constant on U1, the carriers tend to get in their own way.

But yeah, I agree it's best to be sure for the amount of work involved
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] rwd0530:
Well, I would like to go to the U1 but I have an issue changing my phone's CSC (see post #1,419) which you assisted me. Unfortunately even after using the Google Dialer typing in the dialer code nothing happens (Found a few posts of other users experiencing the same issue with no resolution).

So my CSC shows ATT/ATT/ATT which it should be VZW/VZW/ATT (ATT phone unlocked with a Verizon SIM). So the result for me is that I'm unable to get OTA updates which was my main goal. Originally my phone was having issues getting updates and was hoping flashing with the firmware on this thread would get me back on getting OTA updates.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] dj24:
I was just complaining the other day with Tmo's unusually delayed monthly update but it looks like there was a good reason. They just enabled e-sim with April's Security Patch that I just updated to and which was released today. Anyone here thinking of jumping back to the U version to take advantage of this?

Tutorials | T-Mobile Support

Edit: It's still only the March Security update!
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
I'll have a link for TMB 2DUC8 in a few hours posted for y'all
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Compusmurf:
No. U1 forever! LOL
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
DUC8 link is posted in post #2
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] lowkey74:
Download in the works for AT&T locked note 20 ultra. Updated firmware as well.
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] Venom0642:
yup Firmware N986USQU2DUCF
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] truckerdewd:
Security patch is March 1. 😢
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] kangi26:
Ok, one downside I have to being on U1, I'm not able to send/receive pics via text (MMS I suspect) Both on the Samsung and the Google Messaging apps.

Edit, looks like the APN needed a little help
[Samsung Galaxy Note 20 Ultra Guides, News, & Discu] dj24:
Anyone up for a friendly wager? What's the over under that AT&T and Version will follow T-mobile's footsteps and enable e-sim anytime soon?