S20 5G SM-G981U1 can't OTA update using Data - Samsung Galaxy S20 / S20+ / S20 Ultra Questions &

Hi, I have Galaxy S20 5G G981U from Sprint unlock, and using this phone in my country (SEA country) without any problem, eg OTA update via data/wifi, sms & call, but recently I changed CSC from SPR to XAA in order to get faster OTA update & my model number also changed to SM-G981U1, after changed CSC to XAA (US Unlocked) I still get notifications for OTA update but I can't update it using data, it's required me to update using WiFi only, before this on SPR I don't have any issue to update using data. Did anyone also have any problem like me or it's just me only who can't OTA update S20 US unlocked using data only ?

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Galaxy s9 firmware issue

Hi i have a branded galaxy s9 on vodafone uk which i installed btu firmware on then relised i couldnt use wifi or 4g calling so reinstalled vod firmware now my question is how do i get back the firmware csc as this is missing in phone info app and i dont have 4g calling my product code and active csc are both as they should be many thanks
I have s9 bought from carphonewarehouse, XEU csc and it has WiFi calling in the settings after I rang Vodafone, they just updated my apn settings, im on the Vodafone network too. Only thing is 4g calling won't work without Vodafone branded phone.
Sent from my [device_name] using XDA-Developers Legacy app
My phone was brought from vodafone so is a branded phone until i played with it lol
Lol, was thinking of flashing the Vodafone firmware just to try out volte but judging by what you've just said sounds like it's not as easy as that [emoji848]
Sent from my [device_name] using XDA-Developers Legacy app
I've also had an unlocked phone from Samsung direct but on Vodafone. To get wifi calling just give them a call. No settings are sent to accept it's all done OTA. To get Volte or 4g calling whichever it is you do have to have the VOD csc. But I think it has to be the same version as your original firmware. I've just stuck the ARD4 official Vodafone firmware from Sammobile via Odin and it all works out the box. However when I was on the BTU firmware ARD4 all I did was put the ARD equivalent csc from Vodafone firmware via Odin. Used the home_csc file so no data deleted. However Everytime I restarted I got an annoying message saying some network features not available until I factory reset the phone. But Volte etc working so I was happy. Just waiting for Vodafone UK to update their firmware to BRE5 now.
Hope that helps.
P.s when installing the csc from Sammobile even though I selected the UK one the initial screen came up in German. But after restarting and clearing cache it came back to English.

g975U1 August security patch ASGF update released

Got notification this morning for a 217mb update ending in ASGF. Pretty weird since we just got the July patch only two weeks ago, after not getting an update in over two months. Definitely not complaining though! Sorry if repost
I don't see that update on my G975U1
I got it too. August US unlocked
Just got the update!
is available via samfirm
Unfortunately i just switched over to carrier firmware for faster updates. Now Samsung finally does it right. At least carriers should be releasing it in a week or two.
Sent from my SM-G975U using XDA Labs
Whats new in this August update?
ultimatdan said:
Whats new in this August update?
Click to expand...
Click to collapse
No idea. There are no details listed on the Samsung website or in the notification popup. I mean the security patch has been brought up to date (August) but other than that, I can't say.
Got the notification today.... Hopefully someone can breakdown what is in the update because 200+mb is rather hefty right?
what sim are you guys using to get this ota update?
bklynsoulja said:
what sim are you guys using to get this ota update?
Click to expand...
Click to collapse
U1 updates are released by Samsung. One gets a U1 update as long as one has a existing U1 firmware irrespective of the SIM.
WhoIsJohnGalt1979 said:
U1 updates are released by Samsung. One gets a U1 update as long as one has a existing U1 firmware irrespective of the SIM.
Click to expand...
Click to collapse
yea but tmobile sim was causing a delay and alot of people even samsung reps recommend to use another sim to just update the U1 firmware
bklynsoulja said:
yea but tmobile sim was causing a delay and alot of people even samsung reps recommend to use another sim to just update the U1 firmware
Click to expand...
Click to collapse
I believe you have been misinformed. Please be patient and wait for the update to show up on your phone if you are already on U1 firmware or download the latest U1 firmware using Frija and Odin flash. All the very best.
Update is due to a exploit in the chip. Some one can take control of our phones if we are on the same wifi. Kudos for the fast update.
I updated and now I don't get icons on my lock screen for notifications. Anybody else have the same problem?
975u1 August Firmware Patch T mobile
Hello,
I have a US unlocked 975u1 and use Tmobile. No one seems to know what I am talking about with an Aug Update. I have spent time on the Phone with Samsung and Tmob customer service. Stuck on July patch ASCB. Night mode is still disabled. Samsung Switch has nothing on it as of this morning.
How do I get the firmware everyone else is on? If I get a sim card from another carrier, does that sim need to be activated in order to get the latest patch? I am clueless here.
phillyspecial said:
Hello,
I have a US unlocked 975u1 and use Tmobile. No one seems to know what I am talking about with an Aug Update. I have spent time on the Phone with Samsung and Tmob customer service. Stuck on July patch ASCB. Night mode is still disabled. Samsung Switch has nothing on it as of this morning.
How do I get the firmware everyone else is on? If I get a sim card from another carrier, does that sim need to be activated in order to get the latest patch? I am clueless here.
Click to expand...
Click to collapse
G975U1UES2ASGF is on Frija for SPR and VZW download one of them
phillyspecial said:
Hello,
I have a US unlocked 975u1 and use Tmobile. No one seems to know what I am talking about with an Aug Update. I have spent time on the Phone with Samsung and Tmob customer service. Stuck on July patch ASCB. Night mode is still disabled. Samsung Switch has nothing on it as of this morning.
How do I get the firmware everyone else is on? If I get a sim card from another carrier, does that sim need to be activated in order to get the latest patch? I am clueless here.
Click to expand...
Click to collapse
U1 firmware with the August security patch and Night mode is available and does end in ASGF.
Unless you flashed T-Mobile firmware on your U1 model or you purchased an unlocked U1 with T-Mobile firmware already installed (I'm not sure how to check that in the settings but U1 firmware doesn't come with any T-Mobile branded apps) you should be receiving OTA updates from Samsung rather than T-Mobile.
The U1 OTA update was pushed weeks ago making it the only OTA update we received before the carriers.
If you have T-Mobile firmware you could flash the U1 firmware manually and receive OTA updates from Samsung but you will lose T-Mobile branded apps that aren't available in the Play Store. The U1 firmware has also been receiving updates long after the carriers prior to August--in early July we were still on the May security patch.
If you manually flash VZW or SPR firmware as the other member suggested don't flash the User Data partition or you will also get Verizon or Sprint's apps and bloatware. If you do manually flash either of those you will no longer receive OTA updates and will need to keep manually flashing updates in the future.
So I bought my phone directly from Samsung. USA version with snapdragon processor and its non-branded to any carrier, basically an unlocked Galaxy S10+. Its model number is sm-g975u1. Sim card is from Tmobile, my cell phone carrier.. I have software from July 1st, g975u1ueu2ASGB
What do you recommend in my scenario.
Thank you
QUOTE=jhs39;80190022]U1 firmware with the August security patch and Night mode is available and does end in ASGF.
Unless you flashed T-Mobile firmware on your U1 model or you purchased an unlocked U1 with T-Mobile firmware already installed (I'm not sure how to check that in the settings but U1 firmware doesn't come with any T-Mobile branded apps) you should be receiving OTA updates from Samsung rather than T-Mobile.
The U1 OTA update was pushed weeks ago making it the only OTA update we received before the carriers.
If you have T-Mobile firmware you could flash the U1 firmware manually and receive OTA updates from Samsung but you will lose T-Mobile branded apps that aren't available in the Play Store. The U1 firmware has also been receiving updates long after the carriers prior to August--in early July we were still on the May security patch.
If you manually flash VZW or SPR firmware as the other member suggested don't flash the User Data partition or you will also get Verizon or Sprint's apps and bloatware. If you do manually flash either of those you will no longer receive OTA updates and will need to keep manually flashing updates in the future.[/QUOTE]
phillyspecial said:
So I bought my phone directly from Samsung. USA version with snapdragon processor and its non-branded to any carrier, basically an unlocked Galaxy S10+. Its model number is sm-g975u1. Sim card is from Tmobile, my cell phone carrier.. I have software from July 1st, g975u1ueu2ASGB
What do you recommend in my scenario.
Thank you
QUOTE=jhs39;80190022]U1 firmware with the August security patch and Night mode is available and does end in ASGF.
Unless you flashed T-Mobile firmware on your U1 model or you purchased an unlocked U1 with T-Mobile firmware already installed (I'm not sure how to check that in the settings but U1 firmware doesn't come with any T-Mobile branded apps) you should be receiving OTA updates from Samsung rather than T-Mobile.
The U1 OTA update was pushed weeks ago making it the only OTA update we received before the carriers.
If you have T-Mobile firmware you could flash the U1 firmware manually and receive OTA updates from Samsung but you will lose T-Mobile branded apps that aren't available in the Play Store. The U1 firmware has also been receiving updates long after the carriers prior to August--in early July we were still on the May security patch.
If you manually flash VZW or SPR firmware as the other member suggested don't flash the User Data partition or you will also get Verizon or Sprint's apps and bloatware. If you do manually flash either of those you will no longer receive OTA updates and will need to keep manually flashing updates in the future.
Click to expand...
Click to collapse
[/QUOTE]
I would look for the ASGF U1 firmware for U1 with Frija or SamFirm. I'm not sure why you didn't get the OTA.

Will I receive OTA updates?

Today I changed CSC (Galaxy Note 10 Plus) from DTM to DBT using Samkey. After that I flashed Firmware DBT via Odin.But I am afraid that I will not receive OTA updates in the future. I'm not sure Samkey really changed the CSC! But after i pressed Change CSC my phone restarted and then it was written in the program "succeeded"
When I looked in System Info it was still written DTM but I expected this because I have to install Firmware DBT for it to change. After I changed the CSC using Samkey (I hope it has really changed) I flashes the last Firmware DBT > Android 11.
I'm concerned now if I will receive OTA updates in the future or whether I have to install them manually using odin
Can someone pls help me?
Did you receive OTA's after CSC change through Samkey? I have the same doubt in my S22.
Also created a thread: https://forum.xda-developers.com/t/csc-change-through-samkey-no-otas.4454801/

Sim unlocked but OTA updates not

Hello everyone.
I just bought what I thought it was an unlocked S20 Ultra over the internet and, nevertheless my sim card form my country works well (Im from México) the OTA updates dont work.
The last security update it has is from March 2020 and I have checked the system update option but it says that my phone is up to date.
I have seen that maybe that the most recent update can be forced using Odin but I dont know what firmware to download for my model so it can be updated regularly via OTA as I only have found firmware options for another USA Carriers that I dont have, and Im scared to brick it for choosing the wrong one.
Curiously enough, the phone model and IMEI correspond to the AT&T USA variation, however, the start up screen doesnt show up any AT&T logo and the phone doesnt have any bloatware from any carrier. So Im not sure if the phone was already flashed with some fw?
The model that it displays is SM-G988U and the S/W is G988USQU1ATBN'
Hope you can help me to have updates on my phone.
Thanks!
jonalara said:
Hello everyone.
I just bought what I thought it was an unlocked S20 Ultra over the internet and, nevertheless my sim card form my country works well (Im from México) the OTA updates dont work.
The last security update it has is from March 2020 and I have checked the system update option but it says that my phone is up to date.
I have seen that maybe that the most recent update can be forced using Odin but I dont know what firmware to download for my model so it can be updated regularly via OTA as I only have found firmware options for another USA Carriers that I dont have, and Im scared to brick it for choosing the wrong one.
Curiously enough, the phone model and IMEI correspond to the AT&T USA variation, however, the start up screen doesnt show up any AT&T logo and the phone doesnt have any bloatware from any carrier. So Im not sure if the phone was already flashed with some fw?
The model that it displays is SM-G988U and the S/W is G988USQU1ATBN'
Hope you can help me to have updates on my phone.
Thanks!
Click to expand...
Click to collapse
Your device is a US Branded Variant, most likely Verizon/ATT. Go to Settings, About Phone, Software Information, Service Provider Software Version. On the bottom row the last three letters will verify which carrier is branded. If it is in fact AT&T you can download the appropriate fw here. Be sure to select the appropriate carrier in the drop down menu but be aware AT&T typically doesn't offer it's firmware to be accessed online.
Download Samsung Galaxy S20 Ultra SM-G988U TMB USA (T-Mobile) G988USQU1ATBN firmware
Fast download latest Samsung Galaxy S20 Ultra firmware SM-G988U from USA (T-Mobile) with G988USQU1ATBN and Android version 10
www.sammobile.com
You MAY need to be on AT&T's US Network to receive OTA Updates but you should have no problem making and receiving calls and texts in Mexico.
varcor said:
Your device is a US Branded Variant, most likely Verizon/ATT. Go to Settings, About Phone, Software Information, Service Provider Software Version. On the bottom row the last three letters will verify which carrier is branded. If it is in fact AT&T you can download the appropriate fw here. Be sure to select the appropriate carrier in the drop down menu but be aware AT&T typically doesn't offer it's firmware to be accessed online.
Download Samsung Galaxy S20 Ultra SM-G988U TMB USA (T-Mobile) G988USQU1ATBN firmware
Fast download latest Samsung Galaxy S20 Ultra firmware SM-G988U from USA (T-Mobile) with G988USQU1ATBN and Android version 10
www.sammobile.com
You MAY need to be on AT&T's US Network to receive OTA Updates but you should have no problem making and receiving calls and texts in Mexico.
Click to expand...
Click to collapse
Thank you. I just checked and the last three letters are indeed ATT. That means that most likely I cant have fw updates or OTA updates as they dont offer their fw online? Searched on the website yu gave me but there is no ATT carrier option
jonalara said:
Thank you. I just checked and the last three letters are indeed ATT. That means that most likely I cant have fw updates or OTA updates as they dont offer their fw online? Searched on the website yu gave me but there is no ATT carrier option
Click to expand...
Click to collapse
You're most welcome. Verizon is in the drop down menu and since they've merged with AT&T it should be the appropriate FW but it doesn't load after selecting it which reflects AT&T's ongoing efforts to block updates outside of it's proprietary platform. If you're unable to access AT&T's network inside the US the other options are downloading the FW on Samsung's Smartswitch app or acquiring it on ATT/Verizon website. Good luck!

Changing S20 5G to unbranded

I bought a used S20 (SM-G981U) and it was branded U.S. Cellular. I successfully changed the CSC to XAA and that got rid of the branding. I checked the "Software Details" screen and it says XAA/XAA/USC. Do I need to flash a new firmware to be able to get OTA updates from Samsung? I am currently stuck on Android 10 and OneUI 2.5 because it was U.S. Cellular and when I check for updates, it says none are available.
How did you change to xaa? I know there are tutorials but none have worked for me. I have a tmb branded and unlocked......I was able to get stock Samsung on it but still shows tmb/tmb/tmb in the settings. I am trying to switch it to the att stock firm

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