yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S21 Questions] revence1988:
I have a Galaxy s21 olympic edition with number SM-G991Q and i am not receiving montly updates. The last update was the August 2021 patch and was installed on August 30th.

Also smart switch on Windows is not detecting Any new updates.

I tried to reset the device without luck getting new updates.

Does anybody has the same problems with the Galaxy s21 SM-G991Q not receiving updates?
[Samsung Galaxy S21 Questions] TZS03:
I have this phone too, I also only got the August security update.
[Samsung Galaxy S21 Questions] batroc:
Don't worry, they probably lost their update schedule before switching to Android 12. I got updates yesterday for SM-G9910.
[Samsung Galaxy S21 Questions] jussy:
I have the same phone and find it odd that it doesn't show up on sammobile or anywhere else.

Does anyone know where to find original firmwares for it?
[Samsung Galaxy S21 Questions] DirgiEx:
I have too G991Q and I need flash to XAA because I need BAND 20 LTE my country help me pls or altwrnative stock ROM?
[Samsung Galaxy S21 Questions] DirgiEx:
OK I solved :) writing on Mobile S21 G991Q 4G LTE Slovakia Band 20 ALLOWED
[Samsung Galaxy S21 Questions] TZS03:
how did you solve the problem? I need band 20 too
[Samsung Galaxy S21 Questions] DirgiEx:
https://xdaforums.com/t/guide-servi...bands-and-services-5g-low-band-on-u1.4182293/
[Samsung Galaxy S21 Questions] TZS03:
Thank You! finaly works
[Samsung Galaxy S21 Questions] revence1988:
Well on november 8th i finally got the october 2021 update. Hopefully the android 12 update will follow zoon:)
[Samsung Galaxy S21 Questions] gatekeeper11:
I have a question about the G991Q, did any of you get the ESIM to work yet? It is currently software locked - in theory it should have it because it is a Snapdragon chip
[Samsung Galaxy S21 Questions] Corbik:
Do you have Android 12 on G991Q already? Im checking every day but still no luck Should I install non olympic rom? Will that work? Thanks
[Samsung Galaxy S21 Questions] SkandaH:
@Corbik

This particular variant has yet to receive the stable One UI 4/Android 12 update.

@jussy

See here; the model number of this variant is SM-G991Q and the CSC is SJP. At the time of posting this, the latest available firmware version is G991QOPU1AUJ2.
[Samsung Galaxy S21 Questions] Ivixmax:
my version is g9910 and still no update to android 12.

last version a11 octuber security update....

whats happend....
[Samsung Galaxy S21 Questions] Corbik:
What standard version would be closest to G991Q? I tried to flash U1 ROM but no luck
[Samsung Galaxy S21 Questions] jominguta:
Friends i'm also with the SM-G991Q olympic version.. I really need to switch to CSC from ZTO, to try to use VOLTE and WIFI CALLING from my operator in my country, Brazil!

Can someone please help me change CSC to ZTO ? I tried the tutorial above, but it doesn't open anything when typing the codes, were you able to change? I saw that it only works on android 10. but we are on android 11.

I saw that you have the option to change CSC ANDROID 11 via Samkey, but I believe it still doesn't have support for our SM-G991Q device.

@TZS03 @DirgiEx @SkandaH
[Samsung Galaxy S21 Questions] jominguta:
Have you tried switching to another S21 variant's ROM with Snapdragon 888? it worked out ?

If it doesn't work, I think I found our ROM to perform restoration via ODIN, in brink event:

https://samfrew.com/pt/download/Galaxy__S21__5G__/zq1d/SJP/G991QOPU1AUJ2/G991QQOP1AUJ2/
[Samsung Galaxy S21 Questions] Corbik:
Yes I tried the U1 version since it should be US version with Snapdragon888.

That ROM you found, based on the numbers is exactly what is in my phone now.

I think I will just wait some more time to get official Android 12 update, hopefully our special version wont be forgotten :)

But If somebody know which ROM would also work for SM-G991Q and ideally would also support all languages and features (esim for example) please share
[Samsung Galaxy S21 Questions] jominguta:
True, I hope we don't forget... friend know how I can change CSC to ZTO ?
[Samsung Galaxy S21 Questions] Corbik:
No sorry I’m not very experienced at this
[Samsung Galaxy S21 Questions] 5H4D0W913:
Hello Gentleman, Im glad I finally found someone with this version of the S21 online, willing to talk about samsung's firmware security updates support .

The crux of the matter is that I recently decided to buy an S21, but here is Poland the Olympic Edition SM-G911Q is just a bit pricier , like 30 euros (private sellers ofc) and worth upgrading to (S888 instead of exynos , additional ROM). Or is it? Im honestly worried about the rate in which samsung provides these firmware updates, the normal version of the S21 and others got the android 12 already. It would really suck to buy a new phone and not receive any updates. Samsung should support all new models up to 4 years of updates , right? Should I risk it or just wait for the good news from You guys?

Id be really glad to receive some opinions on this. Thanks in advance for your time.
[Samsung Galaxy S21 Questions] Corbik:
Yeah I bought this version exactly for the reason you state - I wanted the Snapdragon version and this was easiest way to get it at that moment, other than that it looks really cool and I like the special edition aspect of it.

Until now the updates were coming at satisfactory rate, I just hope they will not abandon it and will continue to update it with Android 12.

Or smart guys on this forum find the way how to flash it on some standard ROM ;)

If nothing of that happens Im worried I will have to let it go on ebay.

If I were you I would wait a bit to see if updates come or not
[Samsung Galaxy S21 Questions] jominguta:
Friend you tried flash via ODIN to U1 rom? What was there?

Did you need to flash the rom from the G991Q again or not, got the rom on which link?

I believe that it should work because they have the same specifications, but I haven't had time to try it yet.
[Samsung Galaxy S21 Questions] Corbik:
Yes I tried to flash U1 via Odin, I got only error message and nothing happend, original ROM remained intact
[Samsung Galaxy S21 Questions] tommmax64:
Hello, I have the S21 Olympia Edition directly from a participant of the Tokyo Olympics (country code SJP). After I still have not received an update to Android 12, I wrote to support. I got the information that there will be updates for this version only in the country from which it comes, so Japan. In Germany, I will never get an update for it.

So I also need a stock ROM that I can flash with Odin.
[Samsung Galaxy S21 Questions] tommmax64:
Or maybe there is a way to change the country code to get updates?
[Samsung Galaxy S21 Questions] Corbik:
wow how stupid is that considering this phone got participants from all around the world
[Samsung Galaxy S21 Questions] revence1988:
Is it not possible to trick the phone with a VPN and set it to Japan to receive the updates?
[Samsung Galaxy S21 Questions] tommmax64:
No. We have to change CSC. I tried with samkey . But since now it doesnt work. Waiting for support to reply.
[Samsung Galaxy S21 Questions] jominguta:
I also thought about samkey, but I don't think it has support for our cell phone.. I believe that if we can install the G991U rom, we will be able to change the CSC with samkey, because the G991U has samkey support and has the same hardware specifications as our G991Q
[Samsung Galaxy S21 Questions] tommmax64:
I did chat with samkey Support and they said CSC change for our g991q is supported. But unfortenatly it didnt work. So i have to wait for Support Help.
[Samsung Galaxy S21 Questions] jominguta:
you later please let me know? I need to change the CSC in an attempt at wifi calling, not so much updating.. I need a lot of wifi call working
[Samsung Galaxy S21 Questions] revence1988:
Is it even possible to flash different firmware? In this topic one person tried and not succeided and i cannot find any other example of people trying this.

I hope this is possible because i only get 4g signals and no 5g signals with the Galaxy s21 G911Q.

Also this firmware supports poorly the Dutch language in settings etc..

Also nice to receive updates on my S21 coming from several pixels phones:)
[Samsung Galaxy S21 Questions] tommmax64:
Sure
[Samsung Galaxy S21 Questions] jominguta:
I still don't have time to try, but I believe it's possible
[Samsung Galaxy S21 Questions] revence1988:
I will try to flash the 991u firmware this week and post the results.

Is it important which carrier i chose when i download the firmware?
[Samsung Galaxy S21 Questions] jominguta:
from what I saw there is a USA, I believe it is clean without an operator, in my opinion it would be better .. not to have operator blotware
[Samsung Galaxy S21 Questions] tommmax64:
if you are successful, a detailed description of your actions here would be very helpful. i keep my fingers crossed for you.
[Samsung Galaxy S21 Questions] revence1988:
Well i does not work flashing the 991u firmware after several attemps and different Odin versions. I keep getting error messages and fails in Odin:(
[Samsung Galaxy S21 Questions] 5H4D0W913:
According to this website:

https://samfrew.com/model/SM-G991Q/region/SJP/

there is a firmware with multi csc. Does it mean that by flashing it, we would be able to choose a different CSC via the dial numer method?
[Samsung Galaxy S21 Questions] jominguta:
however dial method to change CSC no longer works on Android 11, only One Ui 3.0 or lower (Android 10) versions
[Samsung Galaxy S21 Questions] 5H4D0W913:
Have you tried other Snapdragon based firmware? like SM-G991W (Canada); SM-G991N (Korea); SM-G9910 (China) ?
[Samsung Galaxy S21 Questions] revence1988:
No i only tried the SM-G991U firmware. I did not have enough space left on my computer to save multiple firmwares.
[Samsung Galaxy S21 Questions] 5H4D0W913:
Can You please try to delete the not working one and try with the others? I would do it but i don't have the phone - still deciding wheather to buy it.

Or try to flash it with ADB

How to Flash Custom ROM using ADB sideload [Easy Steps]

Flash Custom ROM zip file with ADB and Fastboot commands on any Android phone. Install Custom Firmware without TWRP recovery using CMD.

www.droidthunder.com
[Samsung Galaxy S21 Questions] revence1988:
I will try later this week other versions but the error codes were not firmware related so my hopes are low that other firmware version will work.

I prefer to keep my S21 stock and not use TWRP to flash another firmware. First i have to do more research if this method will work. It has been a long time for me to use TWRP and custom roms. I have used Google pixel phones for the last few years without flashing etc.
[Samsung Galaxy S21 Questions] Corbik:
Korea version should be with Exynos so I dont think there is a chance, dont know about Canada

G9910 is only one I didnt try yet but on sammobile there isnt Android12 firmware for this version yet

Im still hoping the update will come with normal OTA update. I had several updates for this phone coming (In Czech republic) so I think this one will come too, one day… :)
[Samsung Galaxy S21 Questions] revence1988:
If flashing other firmware does not work i am forced to switch to a Dutch Galaxy S21 or a Google Pixel 6 but i really like the S21 olympic edition and it larger storage. The hardware is great but i have several problems with the software.
[Samsung Galaxy S21 Questions] Corbik:
Can you please list the problems? I know you said the language is only partly supported, that bothers me too a bit. I cant understand why they cant put all languages in all roms, like why is there even option to switch to czech if its half baked? I think the settings items etc are same in all this phones so why some roms have only limited language support is beyond my understanding. (I had Note9 US version before and it was same)

Otherwise I dont have problems with this phone, only lack of esim settings.
[Samsung Galaxy S21 Questions] revence1988:
I have the following problems:

- no 5g signals

- signals drops very often

- Dutch language support is a mess in the entire system

- led pictogram editor app keeps popping up

- notifications are late

Alle these problems keeps recurring even after multiple wipes
[Samsung Galaxy S21 Questions] revence1988:
I tried to flash the firmware SM-G991U again but with no succes. I use Windows 11 perhaps there are driver issues which are not present on Windows 10. Unfortunatly i do not have a Windows 10 computer to test this.
[Samsung Galaxy S21 Questions] Corbik:
Oh that kind of sucks, truth is I use it like a second phone and not that often so maybe I didnt find out about the signal problems yet :(
[Samsung Galaxy S21 Questions] revence1988:
Well i have sold my S21 olympic edition and got a Dutch S21
[Samsung Galaxy S21 Questions] Corbik:
L

Nice, Is everything ok now? Did you get the Android 12 udpate right away? How much did you get for olympic ?
[Samsung Galaxy S21 Questions] revence1988:
I Will receive my new S21 tomorrow.

Sold the Olympic edition for 400 euro to a friend of mine.
[Samsung Galaxy S21 Questions] enis.pilkati:
There is a list on the ntt docomo there are all the smartphone that will get the android 12 update and there is the s21 olympic edition there

ドコモからのお知らせ : Android（TM）12 へのバージョンアップ提供製品について | お知らせ | NTTドコモ

Android（TM）12 へのバージョンアップ提供製品についてご案内いたします。

www.nttdocomo.co.jp
[Samsung Galaxy S21 Questions] 5H4D0W913:
the listed version is SC-51B , while we are discussing SM-G991Q . I think there is a difference. That is the risk i am not going to take. I bought standard EU version of the S21. I won't buy the olympic edition until iIsee the updated firmware on samfrew.com
[Samsung Galaxy S21 Questions] Corbik:
There are more versions of the olympic edition? Interesting
[Samsung Galaxy S21 Questions] 5H4D0W913:
according to SAMFREW, SC-51B is the version for Japan and the region for SM-G991Q is SJP (unknown) - the CSC code is SJP as well and on the CSC lists all over internet i couldnt find that particular one
[Samsung Galaxy S21 Questions] enis.pilkati:
Yes but i so that even the Japanese version is on the October's security patch like the sm g991q i think that when will get the update we will get it to
[Samsung Galaxy S21 Questions] 5H4D0W913:
Maybe u are right , its just the fact that you won't know when the update is gonna appear OTA. And the additional minor updates? The security ones? just too much stuff overlooked by Samsung in this version- and remember ur paying as much (or even more) in comparison to normal version. As i said i just got the EU version with exynos because i couldn't imagine spending that much money on a flagship device without regular updates.
[Samsung Galaxy S21 Questions] Snowwow:
Does anyone know if it is still possible to activate band 20 on the SM-G991Q? I only get Carrier Aggregation on B1 and B3, while my friend with exactly the same provider/plan also has B20 (on a S7 tho).

When using Samsung Band selection, I can't even choose B20. And when trying to force LTE B1 for example, I get 🚫 even though netmonster tells me I am connected to that band (only an other provider). Very weird, because I do get B1 and B3 when leaving it on automatic. In the Netherlands btw.
[Samsung Galaxy S21 Questions] 5H4D0W913:
Check this thread on previous page, i think someone did it
[Samsung Galaxy S21 Questions] Snowwow:
Could you quote that? Can't find it on the previous page.
[Samsung Galaxy S21 Questions] 5H4D0W913:
https://xdaforums.com/t/guide-servi...bands-and-services-5g-low-band-on-u1.4182293/

this should work
[Samsung Galaxy S21 Questions] Snowwow:
Yeah I managed to unlock all LTE bands that way, but i still can't get the 4g+ symbol to show up and get more than 2 CA.
[Samsung Galaxy S21 Questions] Corbik:
I feel you, also already bought Pixel Pro for "playing around with Android" but I have to say that Galaxy S21 form factor is superior, the phone is lighter and much nicer to hold. How do you compare battery life on Exynos version to Snapdragon?
[Samsung Galaxy S21 Questions] diddykong00:
Olympic edition S21 super nice looking phone, awesome that it has 256GB, but man I regret getting this just from the updates standpoint. Samsung support is so awful too. Why give out 17000 phones to athletes around the world but not allow them to get regular updates? Basically promoting to not use Samsung devices.
[Samsung Galaxy S21 Questions] Gastonlagaffe:
No update by Samsung on s21 sm g9910 (China/Hk/Taiwan) since october 21.

Maybe Samsung support discontinued apparently ... I hope that's wrong.. Maybe in 2022 ...
[Samsung Galaxy S21 Questions] 5H4D0W913:
i didn't buy the snapdragon variant, its not available here in Poland but I saw the benchmarks saying that snapdragon is better overall. Now I use the exynos variant and the battery life isn't great but again- i don't have a comparison and its not so bad either
[Samsung Galaxy S21 Questions] 5H4D0W913:
thats why this version is so ****. I got a new security update just a few days ago and this alone is why i chose the EU version
[Samsung Galaxy S21 Questions] Gastonlagaffe:
a lot of regret for me. i would try to sell it if samsung doesn't release an update within 2 months.

samsung's lies about flagship updates calmed me down a little bit.

Next Time Google pixel ?

I have exynos version too. (French CSC)
[Samsung Galaxy S21 Questions] VladTepes77:
Same here - any one any idea why exactly? the HK version used to be rather "quick" in updates until this major one?
[Samsung Galaxy S21 Questions] Gastonlagaffe:
open china model's got the update (21.12.29)

Unfortunately no OTA for HK and Taiwan version.

Find on :

Download firmware updates for your Samsung mobile phone and tablet

Firmware for Samsung Galaxy mobile phone & tablet ✔ Find any update, ever released by Samsung. ✔ Free downloads & high-speed options available. ✔ For all versions and all devices. ✔ Including instructions

www.sammobile.com
[Samsung Galaxy S21 Questions] Gastonlagaffe:
02.01.2022 New version for the New Year.

Android 12 coming on hk version.
[Samsung Galaxy S21 Questions] gatekeeper11:
I'm really surprised no one had luck flashing a different snapdragon rom! Secondly, I am equally shocked that esim is not available purely because of software.

Sadly support has also not been helpful in resolving the android 12/esim/updates topic
[Samsung Galaxy S21 Questions] Gastonlagaffe:
No esim on hk version ?
[Samsung Galaxy S21 Questions] VladTepes77:
nope - nothing there with the Android12 (Dec. Update) on HK version
[Samsung Galaxy S21 Questions] ToMiKoN:
I will make the thinks more confusing! There is even another version!

There is an Olympic and Paralympic Samsung S21 delivered to athletes. As a Paralympic Goalball athlete for Belgium, i received the Samsung S21 Paralympic edition! This phones shares the same SM-G991Q model number, but has different logos on the phone and on the theme installed.

Unfortunately it shares the same problems as with the Olympic edition.

- No band 20 / 800 mhz, used a lot in my country

- No complete Dutch language support

- No Android 12 update (yet)

I talked to a Samsung employee at the Olympic village because they had SIM issues during the Paralympics. He confirmed that the version that you can buy in the shops in Japan was a different phone for the Japanese market and doesn't share ROM.

I hope these problems get fixed, because I stay on my iPhone as long as these are not fixed!
[Samsung Galaxy S21 Questions] Snowwow:
I'm living in the Netherlands and have the same issues as you, but i did manage to unlock band 20. Sadly enough, it's rarely used because there is no CA combo supporting it. To unlock band 20, follow the guide about CSC/ Unlocking bands posted in this thread before. To see the CA bands supported, check cacombos.com, i have send them the file containing the CA Combos for the olympic model.
[Samsung Galaxy S21 Questions] kyazeg:
Hey, the android 12 for s21 Olympic version (G991Q) is now out as of today
[Samsung Galaxy S21 Questions] kyazeg:
Hey, the android 12 for s21 Olympic version (G991Q) is now out as of today

Hey, the android 12 for s21 Olympic version (G991Q) is now out as of today
[Samsung Galaxy S21 Questions] enis.pilkati:
yes finally 🙌
[Samsung Galaxy S21 Questions] ToMiKoN:
Yep, the Paralympic version got the update too!

Has somebody been able to test if band 20 / 800 Mhz 4G is still an issue? Are there other significant changes?
[Samsung Galaxy S21 Questions] petrg:
Ad LTE Band 20: Unfortunately NO, still no (working code) access to diagnostic menu to follow this guide - https://xdaforums.com/t/guide-servi...bands-and-services-5g-low-band-on-u1.4182293/

Ad significant changes: I guess that's pretty subjective ...many times described A12/UI 4.0 innovations and everyone has to weigh the pros/cons. For me the most important is bult-in "battery care" 85% charging limit (+security update) ... the others are rather design improvements.

P.S. I'm back on the A11 and still pissed @ Samsung, what the hell is the point of limiting LTE bands on a phone that has been a gift to athletes around the world.
[Samsung Galaxy S21 Questions] TZS03:
Try with this code *#*#276633683782#*#*
[Samsung Galaxy S21 Questions] petrg:
"P.S. I'm back on the A11" ... and it's not working there either (I can access it via rooted method only in Samsung Phone INFO by vndnguyen)

You'll have to try it yourself ...
[Samsung Galaxy S21 Questions] TZS03:
I have the olympic editon, and originaly

i have the olympic edition, it wasn't originally band 20, but with google dialer and this code i managed to get into the band config menu and managed to bring up band 20. it remained fine even after the Android 12 update
[Samsung Galaxy S21 Questions] ToMiKoN:
I didn't get into that menu to activate band 20 / 800 Mhz. The code does not work with Google Dailer.

Stupid question, but did anyone contact official Samsung support in this topic?
[Samsung Galaxy S21 Questions] broly59:
you have to flash e unlocked firmware (U1) then you'll get OTA updates. Flashing firmware can be done using Odin.
[Samsung Galaxy S21 Questions] csmdew:
My S21 doesn't update either and was wondering if someone could help identify my problem. My phone's IMEI says that it is a verizon phone but the last software update was with ATT version. When I got this phone I stuck a att sim in to make sure it was unlocked and it added some att garbage, Icon being one of them. But the software is dtd apr 2023 and I just bought phone in July and has not updated since I had it. I use it with a small company that uses T-mobile service. If I factory reset will it delete the att crap that loaded when I put their sim in it and then update with verizon software. Should I force update with odin using verizon or att current software version. Really want to get an updated phone for at least one of my last 2 purchases. S20 won't ever update either. I'm old disable vet as could use some help getting this problem fixed, thanks.
[Samsung Galaxy S21 Questions] broly59:
Use a factory unlocked firmware (U1) type to flash your phone. My model was smg996u usa verizone. I couldn’t update my phone then i flashed smg996u1 and yesterday got November 1 update OTA.
[Samsung Galaxy S21 Questions] csmdew:
I'm not sure how to do that or where to get right file; should I use verizon or att factory file; guessing verizon since it is verizon phone. Any straight forward instruction for old simple ppl to do it. thx
[Samsung Galaxy S21 Questions] csmdew:
so which firmware do I get, I got base s21 mdl sm-g991, thx
[Samsung Galaxy S21 Questions] broly59:
It'll be helpful if you provide an screenshot od your phone software information.
[Samsung Galaxy S21 Questions] csmdew:
Do I flash back to factory or to new version; don't know how to take pic of the phone
[Samsung Galaxy S21 Questions] broly59:
A new version. The lastest version for s21 global phones so that after each new update releases, you'll eventually get OTA updates. Use odin (for flash) and frija tool ( for downloading firmware). The downloading is quite slower because this websites provide low bandwith for free users. The average downloading speed for me was 0.6Mbps in frija software. Started on a laptop then left it the whole night.
[Samsung Galaxy S21 Questions] csmdew:
Baseband version G991USQS6EWD5
[Samsung Galaxy S21 Questions] csmdew:
freja say firmware for mdl/csc not found