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Just received received a firmware update for my S9 via OTA.
Here is what levels it took me to. Not sure what all is included, but my FM radio now works.
https://forum.xda-developers.com/attachment.php?attachmentid=4535198&stc=1&d=1529937581
Yes! Finally.
Tried manual update and It's downloading now.
fzambon said:
Yes! Finally.
Tried manual update and It's downloading now.
Click to expand...
Click to collapse
Hi Folks! I just got the update on my G960U1 and couldnĀ“t notice too much of a change. I bought it in the US and I live in Brazil and the so called FM radio does not exist. Should it be available?
Can I add one more question here? If I flash SM-g9600 (128gb S9 Brazil ZTO ROM) into my SM-g960u device (US unlocked 64gb), should it work without issues?
thanks for helping a new member!
best,
GV
GV,
Use the NEXRADIO app from the google play store. it will work, you MUST have head phones plugged in, they are used for the antenna.
https://play.google.com/store/apps/details?id=com.nextradioapp.nextradio
Bobw55 said:
Just received received a firmware update for my S9 via OTA.
Here is what levels it took me to. Not sure what all is included, but my FM radio now works.
https://forum.xda-developers.com/attachment.php?attachmentid=4535198&stc=1&d=1529937581
Click to expand...
Click to collapse
I notice that this update was released 3/27/2018 so it's already 3 months behind the release date.
Bobw55 said:
Just received received a firmware update for my S9 via OTA.
Here is what levels it took me to. Not sure what all is included, but my FM radio now works.
https://forum.xda-developers.com/attachment.php?attachmentid=4535198&stc=1&d=1529937581
Click to expand...
Click to collapse
What carrier are you on?..and everyone else?
bzzybfrm313 said:
What carrier are you on?..and everyone else?
Click to expand...
Click to collapse
I got the update this morning on my S9. I'm on T-Mobile in Arizona.
bzzybfrm313 said:
What carrier are you on?..and everyone else?
Click to expand...
Click to collapse
I am using Cricket, but I bought the unlocked version of the S9, I did not want all of Cricket's bloatware.
phil737 said:
I got the update this morning on my S9. I'm on T-Mobile in Arizona.
Click to expand...
Click to collapse
I'm on T-Mobile also in Michigan.... Still waiting
i cant tell if there was any os updates, i think its just a straight security patch. though my update size is 681MB?
camera launching is about the same as the previous build.
dont know yet of the battery
eastsidebiz said:
i cant tell if there was any os updates, i think its just a straight security patch. though my update size is 681MB?
camera launching is about the same as the previous build.
dont know yet of the battery
Click to expand...
Click to collapse
It wasn't an OS update of sorts, it was a 3 month old security update and the below notes from Samsung.
"The stability of Face unlock has been improved."
"The stability of Camera has been improved."
I see that they have supposedly also enabled the FM tuner on unlocked phones.
guilhermenv said:
Hi Folks! I just got the update on my G960U1 and couldnĀ“t notice too much of a change. I bought it in the US and I live in Brazil and the so called FM radio does not exist. Should it be available?
Can I add one more question here? If I flash SM-g9600 (128gb S9 Brazil ZTO ROM) into my SM-g960u device (US unlocked 64gb), should it work without issues?
thanks for helping a new member!
best,
GV
Click to expand...
Click to collapse
No major changes.
Has anyone flashed this on the HK/Latin America dual SIM snapdragon G9600/DS models? I'm thinking of flashing but i haven't done this before. So, hoping for some data points from experts before I do this myself since I'm concerned I might do something wrong and brick my phone :|
sentron said:
Has anyone flashed this on the HK/Latin America dual SIM snapdragon G9600/DS models? I'm thinking of flashing but i haven't done this before. So, hoping for some data points from experts before I do this myself since I'm concerned I might do something wrong and brick my phone :|
Click to expand...
Click to collapse
whyyyy would u even wanna do that?
id recommend not.. bootloaders and such are dif. if ur unlocked u could really screw it up..
if its locked, well, it wouldnt even flash
Tel864 said:
I see that they have supposedly also enabled the FM tuner on unlocked phones.
Click to expand...
Click to collapse
Yes, FM chip is activated and working.
On T-Mobile, California
Bobw55 said:
Just received received a firmware update for my S9 via OTA.
Here is what levels it took me to. Not sure what all is included, but my FM radio now works.
https://forum.xda-developers.com/attachment.php?attachmentid=4535198&stc=1&d=1529937581
Click to expand...
Click to collapse
Thanks for the info.
I am using the Tmobile Cousin S9 of your device
but on Metro PCS and that ARF4 Update is in my
Notifications whether I want it there or not (lol).
Before I install it I am trying to find out IF there is any overheating or warming or other issues.
I sm not a Dev but wonder why if it's security patches is the file so huge at .75 GIG ?
Apparently they had to re-write most of the Code ?
On my previous Samsung Factory Unlocked 850 M each update increased the size of the Operating System and had less free RAM and a bit more heat and less efficient because the battery and CPU was busy just running the larger OS.
However the S9 and SOC is in another league and the battery monitor in the 'maintenance' section is very efficient at putting Apps to sleep until you need them then they go back on automatically when used..
Still - why is this file .75Gig ?
Has it improved the phone operation?
Is it running background security scans that we can't touch that warm up the phone and use more battery OR is it efficient ?
robertkoa said:
Thanks for the info.
I am using the Tmobile Cousin S9 of your device
but on Metro PCS and that ARF4 Update is in my
Notifications whether I want it there or not
Click to expand...
Click to collapse
I have not noticed any real difference in performance in the phone.
I have never noticed a heat issue while charging, but then I use a wireless charger on my bed side table.
I would just install it. Your security will be up to date then.
Is NextRadio Required?
Bobw55 said:
GV,
Use the NEXRADIO app from the google play store. it will work, you MUST have head phones plugged in, they are used for the antenna.
https://play.google.com/store/apps/details?id=com.nextradioapp.nextradio
Click to expand...
Click to collapse
I wonder if NextRadio is a requirement for using the newly-enabled FM radio chip? I'd rather not grant yet another application my GPS location and the ability to use the (say what?!) microphone. It seems, now that the FM hardware chip is being used, rather than streaming FM radio over my data plan, that some of NextRadio's permissions are over-reaching. Some older HTC phones (HTC Incredible S & HTC Aria) had a simple dedicated app for the FM radio.
I completely understand the requirement for the headphone jack serving as the FM radio antenna. That's been required since Sony Walkmans in the 1980s... Probably earlier!
Thanks in advance for any tips you have, or applications you can suggest..
There are many FM radio APPs out there.
I only used next radio cause it was free and worked.
You don't actually have to use headphones either. If I want to play through the speaker I use an old headphone that I cut the first foot off of for an antenna.
So I just purchased a new pixel 2 XL, an I'm getting ready to update my phone to the latest 8.1 OTA firmware from Google developer section (pie looks to have too many problems that are unacceptable to me), and I'm seeing T-Mobile firmware. I am on T-Mobile in the US, but I'm wondering if this is firmware for European market or something weird.
Should I use the T-Mobile firmware, or the non-specified OTA?
Soured Lie said:
So I just purchased a new pixel 2 XL, an I'm getting ready to update my phone to the latest 8.1 OTA firmware from Google developer section (pie looks to have too many problems that are unacceptable to me), and I'm seeing T-Mobile firmware. I am on T-Mobile in the US, but I'm wondering if this is firmware for European market or something weird.
Should I use the T-Mobile firmware, or the non-specified OTA?
Click to expand...
Click to collapse
Go into settings/system/about phone. Look at the build number at the bottom. Choose the firmware that correspond with that number.
Eg: OPM2.
Chance Ill said:
Go into settings/system/about phone. Look at the build number at the bottom. Choose the firmware that correspond with that number.
Eg: OPM2.
Click to expand...
Click to collapse
Thank you for answering, unfortunately the only update that corresponds with OPD1 for my device is the firmware I am currently on. There are also multiple firmwares with the same date for other similar numbers (there is an OPD1 for Rogers, as well as one for Telstra and another with no signifier and so on). I'm not seeing anything that really correlates to my device in particular. Not for updates anyways. The build numbers have changed.
In my mind it is only logical that they have Google images and Verizon images as they never released model that was carrier specific outside of those two.
Soured Lie said:
Thank you for answering, unfortunately the only update that corresponds with OPD1 for my device is the firmware I am currently on. There are also multiple firmwares with the same date for other similar numbers (there is an OPD1 for Rogers, as well as one for Telstra and another with no signifier and so on). I'm not seeing anything that really correlates to my device in particular. Not for updates anyways. The build numbers have changed.
In my mind it is only logical that they have Google images and Verizon images as they never released model that was carrier specific outside of those two.
Click to expand...
Click to collapse
What model do you have? Verizon, Telstra, Rogers, etc
Chance Ill said:
What model do you have? Verizon, Telstra, Rogers, etc
Click to expand...
Click to collapse
I have an unlocked Google edition 2xl running on t-mobile network.
When did they ever make a Rogers or T-Mobile version?
Soured Lie said:
I have an unlocked Google edition 2xl running on t-mobile network.
When did they ever make a Rogers or T-Mobile version?
Click to expand...
Click to collapse
Some carriers like Verizon sell (not make) the Pixel thus the .img files correlates with that network for compatibility. I also use my device on T-Mobile US but us the OPM2 firmware because TMobile firmware (OPM4) caused modem issues
Chance Ill said:
Some carriers like Verizon sell (not make) the Pixel thus the .img files correlates with that network for compatibility. I also use my device on T-Mobile US but us the OPM2 firmware because TMobile firmware (OPM4) caused modem issues
Click to expand...
Click to collapse
I really appreciate your help. I am on stock firmware and have really good connectivity, so I think I'll do what you have done and stick to similar firmware.
I have one last question. I'm about to sideloaded this, the instructions say to make sure there are no pending updates before proceeding. I have pending pie update which I have not downloaded, is this going to cause issues? I can't see why it would. I guess at worst it will reject my sideloaded at worst if it was expecting something else?
Soured Lie said:
I really appreciate your help. I am on stock firmware and have really good connectivity, so I think I'll do what you have done and stick to similar firmware.
I have one last question. I'm about to sideloaded this, the instructions say to make sure there are no pending updates before proceeding. I have pending pie update which I have not downloaded, is this going to cause issues? I can't see why it would. I guess at worst it will reject my sideloaded at worst if it was expecting something else?
Click to expand...
Click to collapse
As long as you haven't downloaded the ota, you should be fine.
Chance Ill said:
As long as you haven't downloaded the ota, you should be fine.
Click to expand...
Click to collapse
Already updated. Everything is smooth so far. Thank you for taking the time to help. I used to make ROMs when ICS was out, but everything has changed. Partition scheming and the whole 9. I'm a newbie all over again. I forgot how much I enjoyed Android. Very liberating after being on iOS for so long. Anyhow, have a good day.
Soured Lie said:
Already updated. Everything is smooth so far. Thank you for taking the time to help. I used to make ROMs when ICS was out, but everything has changed. Partition scheming and the whole 9. I'm a newbie all over again. I forgot how much I enjoyed Android. Very liberating after being on iOS for so long. Anyhow, have a good day.
Click to expand...
Click to collapse
Lol. Yeah, much has changed since the good ole days. Welcome home! ?
Can some one confirm what OTA should I download for T-Mobile US on Pixel XL 2 for 9.0 ? Thank you
The one NOT for Telstra.
I'm hoping they release an update for TMobile. I'm having serious signal issues since moving to Pie... Once the signal drops a bit I immediately drop to 3G or even H+... Never had that issue with the TMobile release for Oreo.
Just a quick question, but i have yet to see any discussion on rooting or roming and of the gsm versions of the tablet, Verizon has had the tablet the longest, but they are a no go with bootloader unlocks so its probably pointless, but i have some small amount of hope for TMobile and and a lesser amount for at&t version. thanks for answering, i bought the tablet anyways because it is literally the last good Android tablet left, root or no root so ill make it work either way, and themes will fix most of my issues anyhow
jaykoerner said:
Just a quick question, but i have yet to see any discussion on rooting or roming and of the gsm versions of the tablet, Verizon has had the tablet the longest, but they are a no go with bootloader unlocks so its probably pointless, but i have some small amount of hope for TMobile and and a lesser amount for at&t version. thanks for answering, i bought the tablet anyways because it is literally the last good Android tablet left, root or no root so ill make it work either way, and themes will fix most of my issues anyhow
Click to expand...
Click to collapse
I had the T-Mobile and Verizon variants of this tablet and neither has "OEM Unlock" for the bootloader so rooting is not possible right now and most likely will require an exploit to be found to allow this. The community is small with these tablets from what I have seen so far.
Also, neither had the latest version of Firmware so Linux on DeX does not work on them yet. This could change any day when an update is rolled out but you will need to wait on the carrier to roll that out.
That said it is a Great Tablet!
fine to know i guess, all i need is a normal Android tab, might mess with the dex stuff but not why i getting it, i would only have rooted it when Samsung gave up on the tablet anyhow, as they always seem to do with the tablets in my experience
I bought the Verizon model not realizing it couldn't be rooted. I returned it.
Another big reason not to buy a carrier branded tablet is that it will be throttled data if using a voice line on TMobile.
However if you buy the Korean model, you can root, use your voice sim for full data speed voice and text apps, and get 6GB of ram.
This is the one I got shipped to the US. No issues whatsoever : https://www.ebay.com/itm/Samsung-Ga...-LTE-Unlocked-4K-Record-SM-T835-/253816928507
Did you have to pay any customs/duty fees? Thx.
graysooner said:
Did you have to pay any customs/duty fees? Thx.
Click to expand...
Click to collapse
Nope, no fees. The item description warned of that but I didn't pay anything outside of eBay
I'm very happy and would do it again
philow said:
I had the T-Mobile and Verizon variants of this tablet and neither has "OEM Unlock" for the bootloader so rooting is not possible right now and most likely will require an exploit to be found to allow this. The community is small with these tablets from what I have seen so far.
Also, neither had the latest version of Firmware so Linux on DeX does not work on them yet. This could change any day when an update is rolled out but you will need to wait on the carrier to roll that out.
That said it is a Great Tablet!
Click to expand...
Click to collapse
it should work on arj3 correct? i am going to try tonight.. theres a sprint arj3 firmware floating around the internet.. maybe ill upload but not many users on here..
and yes, the usa carrier variants can b cross flashed.. ive flashed sprint firmware onto my vzw tablet no problem
elliwigy said:
it should work on arj3 correct? i am going to try tonight.. theres a sprint arj3 firmware floating around the internet.. maybe ill upload but not many users on here..
and yes, the usa carrier variants can b cross flashed.. ive flashed sprint firmware onto my vzw tablet no problem
Click to expand...
Click to collapse
The T-Mobile build was ARJ3 but it was the September Security Patch and a U1 bootoader. Linux on DeX looks like it needs at least the October Security Patch. Good Luck!
Enjoy
hayabusa1300cc said:
Enjoy
Click to expand...
Click to collapse
It's not available for my us unlocked version yet
Sent from my SM-N975U using Tapatalk
my370z said:
It's not available for my us unlocked version yet
Click to expand...
Click to collapse
Unlocked typically gets the update after all the carriers push out their update. It's the downside of buying the unlocked version.
I kinda don't understand this. How are these updates linked to carriers? I thought these updates are made available over the internet, so if I am on wifi internet, with no sim inside my phone, what any carrier has to do with this update? What am I missing here? These updates are not available on samsung servers?
I recently bought a Nokia 8110 4g phone. Tried to update its firmware with no success over wifi (KaiOS). As soon as I took out the SIM, it found the update and updated with no problem.
Why my Note 10+ would be linked to any carrier? I did not bought it through a carrier and it is not unlocked. It is bought from Singapore and it is SM-N975F/DS (Global) version, while I am being in Europe.
Can someone shed some light into this?
Samsung holds on the Unlocked firmware update until the carrier's start pushing. At least in the USA.
Yeah, but it is unclear to my what is "carrier pushing" and why it is needed. Over the internet, Samsung servers could do this w/o any form of carrier involvement or knowledge. Why "carrier" is in in this chain?!? It is like my Windows would be updated only when my internet service provider wants it.
big_ipaq said:
Yeah, but it is unclear to my what is "carrier pushing" and why it is needed. Over the internet, Samsung servers could do this w/o any form of carrier involvement or knowledge. Why "carrier" is in in this chain?!? It is like my Windows would be updated only when my internet service provider wants it.
Click to expand...
Click to collapse
Exactly, Google and handset manufacturers need to step in! Imagine if Apple let carriers modify iOS! That would never happen! That was a good analogy by the way! :good:
big_ipaq said:
I kinda don't understand this. How are these updates linked to carriers? I thought these updates are made available over the internet, so if I am on wifi internet, with no sim inside my phone, what any carrier has to do with this update? What am I missing here? These updates are not available on samsung servers?
I recently bought a Nokia 8110 4g phone. Tried to update its firmware with no success over wifi (KaiOS). As soon as I took out the SIM, it found the update and updated with no problem.
Why my Note 10+ would be linked to any carrier? I did not bought it through a carrier and it is not unlocked. It is bought from Singapore and it is SM-N975F/DS (Global) version, while I am being in Europe.
Can someone shed some light into this?
Click to expand...
Click to collapse
Same thought. I stay here in Singapore & I bought it directly from Samsung, until now no OTA update. In Singapore, network providers never lock any smartphone, but 3 major networks here have different CSC (SIN/STH/MM1), mine was the non-network Singapore CSC which is XSP, still to no avail. I am forced to update via odin because of this.
big_ipaq said:
Yeah, but it is unclear to my what is "carrier pushing" and why it is needed. Over the internet, Samsung servers could do this w/o any form of carrier involvement or knowledge. Why "carrier" is in in this chain?!? It is like my Windows would be updated only when my internet service provider wants it.
Click to expand...
Click to collapse
This is because the carriers can customise the firmwares for their network. (add in extra apps; turn options on or off etc.) so therefore the carriers have to approve each and every new firmware that's developed by Samsung.
Samsung will do the actual "pushing" of the carrier-cusomised firmware, but only once the carrier gives them permission to do so.
stuclark said:
This is because the carriers can customise the firmwares for their network. (add in extra apps; turn options on or off etc.) so therefore the carriers have to approve each and every new firmware that's developed by Samsung.
[...]
.
Click to expand...
Click to collapse
This is most probably stupid and needs to stop.
big_ipaq said:
This is most probably stupid and needs to stop.
Click to expand...
Click to collapse
That's highly unlikely to happen.
Carrier customisations are fundamental to how the industry is currently working
Can you give me a sample of this "carrier customization"? Fundamental to carriers or to us the customers?
It's most likely contractual.
So essentially, Samsung waits for the carriers to modify their firmware, release that first then release their UNCHANGED firmware/security patch to the unlocked devices...
That is such a crap model. Common sense would say to release what you can first... This would also push the carriers to release these updates in a much timelier manner as there is no benefit to be on carrier software if the patches are months behind the unlocked devices...
ultramag69 said:
So essentially, Samsung waits for the carriers to modify their firmware, release that first then release their UNCHANGED firmware/security patch to the unlocked devices...
That is such a crap model. Common sense would say to release what you can first... This would also push the carriers to release these updates in a much timelier manner as there is no benefit to be on carrier software if the patches are months behind the unlocked devices...
Click to expand...
Click to collapse
LOL, you must be new to Samsung devices!
I kid, I kid. But seriously. It sucks, but it's reality. Benn that way since at least the S8.
I don't show any updates available for my Korean 10+ 5g yet either
Mr. Orange 645 said:
LOL, you must be new to Samsung devices!
I kid, I kid. But seriously. It sucks, but it's reality. Benn that way since at least the S8.
Click to expand...
Click to collapse
This has been the case since the Galaxy S2, if not earlier.
I suspect (but don't know) that Samsung have some form of contractual obligation to the networks to not release any new features etc. until the network devices (don't forget some networks may have paid a lot to Samsung to have an "exclusive" on the handset when it was released) have had a chance to get said feature.
stuclark said:
This has been the case since the Galaxy S2, if not earlier.
I suspect (but don't know) that Samsung have some form of contractual obligation to the networks to not release any new features etc. until the network devices (don't forget some networks may have paid a lot to Samsung to have an "exclusive" on the handset when it was released) have had a chance to get said feature.
Click to expand...
Click to collapse
Didn't even realize they had unlocked models going back that far. I has an S3 and a Note 2, but back then I was on Verizon so there was no thought of carrier unlocked models. It was a V model or nothing, LOL. My next Galaxy after those was an S7Edge, but they were all still carrier exclusive models. I had T-Mobile by them, so I had a G935T. They eventually came out with a G935U, I think, but I never had one.
It wasn't until the S8/+ they had the universal hardware for all carriers, and that's also when I really got back into the Samsung devices and started flashing U1 and U firmware. That was my first experience with unlocked vs carrier model updates. I didn't realize the update situation had been that way since nlthr S2, other than Samsung has always been slow with updates.
Yeah, I said earlier it was likely contractual. Like you I don't know that for sure, but that's the only thing I can think of.
big_ipaq said:
Yeah, but it is unclear to my what is "carrier pushing" and why it is needed. Over the internet, Samsung servers could do this w/o any form of carrier involvement or knowledge. Why "carrier" is in in this chain?!? It is like my Windows would be updated only when my internet service provider wants it.
Click to expand...
Click to collapse
because some carriers like to test the updates and ensure their services andbloatware are working before pushing an update.. last i checked tho sprint and tmobile use Samsung fota servers.. vzw of course just has to use their own servers.. att does as well..
even if u sign up to use samsungs efota advanced it clearly indicates will not work with vzw or att devices...
as far as the rest of the world i have no idea lol
Did anyone with a SM-G990U1/DS model receive the Android 13/One UI 5 update yet?
xda-eh said:
Did anyone with a SM-G990U1/DS model receive the Android 13/One UI 5 update yet?
Click to expand...
Click to collapse
Look here https://www.sammobile.com/firmwares/
joke19 said:
Look here https://www.sammobile.com/firmwares/
Click to expand...
Click to collapse
That page is broken. As you can see from the screenshot, the "Check updates" button doesn't work when I click it.
xda-eh said:
That page is broken. As you can see from the screenshot, the "Check updates" button doesn't work when I click it.
Click to expand...
Click to collapse
And here https://sfirmware.com/ or here https://samfw.com/ ?
joke19 said:
And here https://sfirmware.com/ or here https://samfw.com/ ?
Click to expand...
Click to collapse
Thanks. But I'm not looking to download firmware from third party sites, I just want to know if other people with the same model in the US have received the update.
No updates here. Been waiting and also wondering if any US models have gotten Android 13.
xda-eh said:
Did anyone with a SM-G990U1/DS model receive the Android 13/One UI 5 update yet?
Click to expand...
Click to collapse
@xda-eh Sadly, no.
No update here either and I'm only on the November security update.
Still waiting to receive update, and still on November security patch.
Notify Update
It hasn't been released yet. I'm still anxiously waiting for it!
So is Samsung neglecting the S21 FE?
It probably has more to do with the carriers at this point. They still have to attach all of their bloatware to it.
rafe83 said:
It probably has more to do with the carriers at this point. They still have to attach all of their bloatware to it.
Click to expand...
Click to collapse
The thread is about unlocked phones.
xda-eh said:
So is Samsung neglecting the S21 FE?
Click to expand...
Click to collapse
Part of their commitment has been a very public announcement about consistent support and a minimum number of OS updates. Having purchased a Samsung for this reason, I'm beginning to feel concerned about the device's security.
I have the SM-G990U1/DS and even though it's unlocked it seems to be based on a T-Mobile build based off the "TMB" in the URL I'm given to "learn more" from my last successful update on Dec 20th. According to Sammobile, none of the G990U1 models have received OneUI 5 yet, but the G990U *has*... for the ones carrier locked to Comcast or Xfinity Mobile.
Notify Update
I have a G990U3/DS, factory unlocked direct from Samsung. ATT is my carrier. Still no update for UI 5. Latest update is Security patch November 1
seven5three said:
I have the SM-G990U1/DS and even though it's unlocked it seems to be based on a T-Mobile build based off the "TMB" in the URL
Click to expand...
Click to collapse
Not sure what this means. Please explain.
xda-eh said:
Not sure what this means. Please explain.
Click to expand...
Click to collapse
I had the same problem with a G990U1/DS model. I bought it used from Amazon. Although it is unlocked, my carrier is ATT and i could not get visual voicemail to work. I spent 2 hrs with ATT tech support and could not get it to work. For some reason, some aspects of the phone (including visual VM), was native to verizon or t-mobile and could not be undone. Althought the used phone was in MINT condition, i had to return it because it didnt play well with ATT.
ATT has a list of 21FE models compatible with their network and G990U1/DS was not on their list of devices.
Piranhamoose said:
ATT has a list of 21FE models compatible with their network and G990U1/DS was not on their list of devices.
Click to expand...
Click to collapse
But they do support the non "DS" (dual SIM) version. In general, AT&T has become very picky lately on which devices they'll deem "compatible". And for no good reason.
Has anyone tried this for our S21 FE? And, what is XAA?
Get One UI 5 Update on XAA
Download Samfw Frp Tool Remove Sim card but keep wifi on Change CSC to TMB Check for update and install Insert Sim card back and CSC will change automatically to XAA NO DATA WILL BE LOST
forum.xda-developers.com