Can not flash S9 G960U back to a G960U1? - Samsung Galaxy S9 Questions & Answers

Hello All,
Recently I was able to flash my US AT&T branded G960U to the Samsung unbranded U1 version. After I did that, I flashed my phone using an official TMobile Rom, Oreo I believe. At the time, the boot loader was not locked.
Today I tried flashing back to the Samsung U1 firmware and it keeps failing as I believe that my boot loader is now locked which may have been caused by the TMO ROM.
When I did the flashing, I used the Modded Odin v3.13.1 Raymonf version. I tried the exact same steps tonight again and no luck. I tried on two different computers, have the drivers, files, etc.
Any known work arounds or fixes? I want to go back to the U1 version so I can upgrade to the Oreo 8.1 due to alot of bugs in Oreo 8.0
Thank you

jrockz3000 said:
Hello All,
Recently I was able to flash my US AT&T branded G960U to the Samsung unbranded U1 version. After I did that, I flashed my phone using an official TMobile Rom, Oreo I believe. At the time, the boot loader was not locked.
Today I tried flashing back to the Samsung U1 firmware and it keeps failing as I believe that my boot loader is now locked which may have been caused by the TMO ROM.
When I did the flashing, I used the Modded Odin v3.13.1 Raymonf version. I tried the exact same steps tonight again and no luck. I tried on two different computers, have the drivers, files, etc.
Any known work arounds or fixes? I want to go back to the U1 version so I can upgrade to the Oreo 8.1 due to alot of bugs in Oreo 8.0
Thank you
Click to expand...
Click to collapse
Have the same problem here

The reason you cannot go back to u1 firmware is b/c the att and t mobile firmwares are newer and updated the bootloader to v2 hence you can't go back to the u1 firmware which has a v1 bootloader.
Sent from my SM-G960U1 using Tapatalk

Yeah I think I'm stuck too, however I don't mind as all the t mobile bloatware was able to be uninstalled and it's very responsive. Seems as if arc6 (tmb, 960u) is very fast and doesn't have any of the hiccups I noticed on the Canadian firmware (Telus arc1 seemed better but not as new as arc6 and also a one month older security bulletin).
I'm ok with being stuck however, we just need a U1 firmware with the v2 BL if I'm not mistaken.

How do you tell what version bootloader you are running?

caseyatbt said:
How do you tell what version bootloader you are running?
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I don't know, I just assume the may security update has it.

Forth character from right side is the bootloader version.

Related

Flashing stock Samsung firmware after update to Oreo firmware

Hi,
I followed this post to update my Note 8 to Oreo. I didn't read it carefully enough to realize that its firmware is N950U, which brings all the good bloatwares and carrier firmware. Now, I would like to revert back to Nougat 7.1.1 with stock/pure Samsung firmware. Before messing my phone up, the baseband version was N950USQU1AQI5. My phone's carrier is XAA (the phone is factory unlocked). I have looked everywhere to find this firmware but the only one I find that is XAA is N950U1UEU1AQI5, which is for the U1 models not U (mine is N950UZKAXAA).
Can some one PLEASE help me get rid of Oreo and this carrier firmware and restore my phone to the original firmware it shipped with?
i think Oreo might have the bootloader v3, so you probably cant go back to what it shipped with (bootloader v1 or v2). You might be able to flash BRA5 and whatever was right before it (which is 7.1.1) because that did have the v3 bootloader.
I think U1 is for the unlocked model, so I'm pretty sure thats what you'd want to be flashing.
1. Download SamFirm
2. put in "SM-N950U1" for Model and "XAA" for region
By the way, I think this is the wrong forum for the Note8
I'm sorry, i don't know what you are talking about.
Any chance you could help?
Hi,
I have a Samsung Note 8 Tablet, GT-N5110 that's stuck on the Samsung logo.
Any chance you could help me revive it?
My original post is here:
https://forum.xda-developers.com/ga...msung-gt-n5110-stuck-boot-loop-flash-t3756659
Thanks!

Flashed ATT firmware to U1 (unlocked) firmware, how to restore?

Hello all, I factory unlocked an ATT Galaxy S9 and then successfully flashed to Unlocked firmware via ODIN. Recently acquired an S9+ and want to give the S9 to my mother. How do I go about restoring everything back to default, and back to default ATT firmware?
Thank you in advance! I'm hoping to do it this week so she can have the phone! Blessings! :good:
Same way you flashed the U1 firmware, Odin 3.13.1 and the stock ATT firmware
Did you ever figure this out? I used Odin to flash the U1 firmware so I could try the beta. Overall it worked pretty good, with the only exception being signal strength. I know I can flash U1 firmware, but I'm trying to get back to the original U firmware.

Can all USA Galaxy S9 models be flashed to each other's firmware?

I've read that the Galaxy S9 hardware is identical for all carriers in the USA.
If I bought a factory unlocked Galaxy S9 can I flash it to the carrier I am using (Verizon, Sprint, T-Mobile, AT&T) to enable carrier specific software and features? Can I flash it back to the unlocked firmware?
I already see a thread about flashing the unlocked firmware to carrier models so I am assuming there are no issues there.
Can one carrier model be flashed to another carrier model?
No, bootloaders are different, with the S7 there was an unbranded U firmware that was compatible with most of them, unlocked firmware will be that one for the S9, but no you cannot just flash different device firmwares to the wrong model
I was able to flash the ATT rom onto my Verizon S9. I got a VZ s9 from work but I'm on ATT. For the most part it's worked great, I had done the same thing previously with a Galaxy S7. I say for the most part b/c I am on here tonight to post a question myself about the fact that I'm getting a delay with MMS messages. I imagine it has something to do with the APNs I have setup, but I can't seem to figure it out.
toronado13 said:
I was able to flash the ATT rom onto my Verizon S9. I got a VZ s9 from work but I'm on ATT. For the most part it's worked great, I had done the same thing previously with a Galaxy S7. I say for the most part b/c I am on here tonight to post a question myself about the fact that I'm getting a delay with MMS messages. I imagine it has something to do with the APNs I have setup, but I can't seem to figure it out.
Click to expand...
Click to collapse
Did you have to flash to the U1 software first?
I do think that is what I ended up doing... tried to go directly first and it kept failing. Got fed up and decided to just try and put the bone stock rom on it, and that went on really easily.... so after using it like that a few days I tried to drop the ATT rom on it and it worked without issue.
SEALBoy said:
I've read that the Galaxy S9 hardware is identical for all carriers in the USA.
If I bought a factory unlocked Galaxy S9 can I flash it to the carrier I am using (Verizon, Sprint, T-Mobile, AT&T) to enable carrier specific software and features? Can I flash it back to the unlocked firmware?
I already see a thread about flashing the unlocked firmware to carrier models so I am assuming there are no issues there.
Can one carrier model be flashed to another carrier model?
Click to expand...
Click to collapse
Yes, but you need to go to the u1 firmware 1st then to the other carrier firmware. Also make sure you avoid the newer firmwares with the new bootloader, as the unlocked model and certain carrier models don't have the new bootloader.
*Detection* said:
No, bootloaders are different, with the S7 there was an unbranded U firmware that was compatible with most of them, unlocked firmware will be that one for the S9, but no you cannot just flash different device firmwares to the wrong model
Click to expand...
Click to collapse
lolol
yes u can.. u can flash between U and U1 firmwares no problem..
normally ud b correct tho but since s8/s8+ it has been ok.. just cant flash 9600 or 9650 to a U or U1 device
elliwigy said:
lolol
yes u can.. u can flash between U and U1 firmwares no problem..
normally ud b correct tho but since s8/s8+ it has been ok.. just cant flash 9600 or 9650 to a U or U1 device
Click to expand...
Click to collapse
That'll be why I still thought that then, coming straight from the S7 > S9
Had many members flashing the wrong firmwares thinking they could do that and bricking their S7s / wondering why ODIN failed
*Detection* said:
That'll be why I still thought that then, coming straight from the S7 > S9
Had many members flashing the wrong firmwares thinking they could do that and bricking their S7s / wondering why ODIN failed
Click to expand...
Click to collapse
I tried downloading vzw firmware G960USQS3ARI6 to my unlocked sprint s9 and still not vzw flashed. want to do this so can have voice over LTE. Any other steps im missing? flash went through but still sprint
As soon as Firmware ver. 3 came out for the G960U1, I was able to flash it to my Sprint G960U and finally have VoLTE, WiFi calling and stable LTE for MetroPCS. Used samkey to unlock it from Sprint. My phone is actually performing much faster without all of Sprint's bloatware hogging my RAM and storage space. I can confirm that OTA updates still work the same...I received September's security patch (current) with no problems. Device is still official status and Knox hasn't been tripped.
A lot of people think you can just flash the carrier firmware of your choice and boom, it works...I had the same thought process....that's not the case. You have to make sure that there is a matching firmware version for the carrier you want to flash to, as well as make sure the G960U1 firmware version (the unlocked version of the S9's software you have to flash first before even carrier flashing) is the same version of what is installed on your phone now. It's easy ya'll......just READ lol.
I'm in love with my phone again thanks to XDA. ?
HAPPY FLASHING!
nickosarus2008 said:
As soon as Firmware ver. 3 came out for the G960U1, I was able to flash it to my Sprint G960U and finally have VoLTE, WiFi calling and stable LTE for MetroPCS. Used samkey to unlock it from Sprint. My phone is actually performing much faster without all of Sprint's bloatware hogging my RAM and storage space. I can confirm that OTA updates still work the same...I received September's security patch (current) with no problems. Device is still official status and Knox hasn't been tripped.
A lot of people think you can just flash the carrier firmware of your choice and boom, it works...I had the same thought process....that's not the case. You have to make sure that there is a matching firmware version for the carrier you want to flash to, as well as make sure the G960U1 firmware version (the unlocked version of the S9's software you have to flash first before even carrier flashing) is the same version of what is installed on your phone now. It's easy ya'll......just READ lol.
I'm in love with my phone again thanks to XDA.
HAPPY FLASHING!
Click to expand...
Click to collapse
Hi, I got one unlocked G960U1(G960U1UES3ARI1) and downloaded new fireware(G960U1UES3ARI1-SPR) from sammobile, but after flashed SPR ROM successfully, the info on the phone still shows XAA, anything I missed here? Thanks!
Curtis2018 said:
Hi, I got one unlocked G960U1(G960U1UES3ARI1) and downloaded new fireware(G960U1UES3ARI1-SPR) from sammobile, but after flashed SPR ROM successfully, the info on the phone still shows XAA, anything I missed here? Thanks!
Click to expand...
Click to collapse
Well first off, you have the unlocked phone. I don't. My G960U is originally from Sprint, so I'm not sure about carrier flashing regarding the G960U1. I thought it was supposed to provision itself after you put the sim in, and the associated carrier apps will download since it's the unlocked model...but I may be wrong...
SEALBoy said:
I've read that the Galaxy S9 hardware is identical for all carriers in the USA.
If I bought a factory unlocked Galaxy S9 can I flash it to the carrier I am using (Verizon, Sprint, T-Mobile, AT&T) to enable carrier specific software and features? Can I flash it back to the unlocked firmware?
I already see a thread about flashing the unlocked firmware to carrier models so I am assuming there are no issues there.
Can one carrier model be flashed to another carrier model?
Click to expand...
Click to collapse
I know so many people have already answered your question from some saying No to others saying Yes but you need to Install U1 first and Bla Bla Bla.
I want to give you one specific answer: With S9 you can any Carriers firmware you wish or even Unlocked phone's firmware. You will never have any issue. And you don't ever need to flash U1 or something else before changing carrier firmware you can Flash from ATT S9 firmware to VZW S9 firmware without any issue. You can also flash from U to U1 which is from Carrier specific to Unbranded/Unlocked but only hiccup is original Odin will give you SHA-256 error, which is normal because you are flashing U1 firm to U device or vice versa. This error can easily be resolved by used Patched odin that disabled SHA-256 check. And trust me you will never have any issue.
You will never want to do this but I have gone as far as mix-matching U and U1 firmware together as well. Like flashing AP, BL and CP of U device but flashing CSC of U1 device. and it still works.
hey there, a little late to the party, having trouble with going from a Verizon to a Sprint, even by way of U1. I can't get any of them to work. And I've been told I have to go from VZW to U1 before I went to Sprint. Is that not the case? I'm having a hell of a time getting anything to flash, everything fails.
---------- Post added at 03:08 AM ---------- Previous post was at 02:57 AM ----------
ret4425 said:
hey there, a little late to the party, having trouble with going from a Verizon to a Sprint, even by way of U1. I can't get any of them to work. And I've been told I have to go from VZW to U1 before I went to Sprint. Is that not the case? I'm having a hell of a time getting anything to flash, everything fails.
Click to expand...
Click to collapse
well, I tried to load the Sprint image from the VZW, no dice. It said it passed, but upon reboot loaded up the old Big Red (even with the Sprint SIM in it).
Anyone have any ideas? This is driving me insane....

Guys if I flash android 10 again, will system see the next security patch for January

Tired waiting for sprint to send android 10 update.
lame carrier locked.
Use the Frija tool and download the Sprint variant of Android 10.
https://www.sammobile.com/samsung/g...SM-N975U1/SPR/download/N975U1UEU2BSLC/309277/
AFAIK you should still receive OTA updates
AllTheWay said:
Use the Frija tool and download the Sprint variant of Android 10.
https://www.sammobile.com/samsung/g...SM-N975U1/SPR/download/N975U1UEU2BSLC/309277/
AFAIK you should still receive OTA updates
Click to expand...
Click to collapse
Thank you very much, however I am on a locked device and it's a miracle you found a sprint variant even though none reporting they got it on sprint. And the csc says unknown.
I am not ungrateful. I am afraid to flash via odin unlocked variant.
I have firmware N975USQU2BSL7 already of locked devices in the USA but the SPRINT USER DATA MD5 file,. and my query was if i install what I have, when january's patch comes will it update if im on december now. I would not yet try unlocked firmware and thank you for All you provided.
MASTERGRAD said:
Thank you very much, however I am on a locked device and it's a miracle you found a sprint variant even though none reporting they got it on sprint. And the csc says unknown.
I am not ungrateful. I am afraid to flash via odin unlocked variant.
I have firmware N975USQU2BSL7 already of locked devices in the USA but the SPRINT USER DATA MD5 file,. and my query was if i install what I have, when january's patch comes will it update if im on december now. I would not yet try unlocked firmware and thank you for All you provided.
Click to expand...
Click to collapse
It will still work. The SPR in the ROM stands for Sprint. Check the CSC file to confirm before you flash it but I thought it said SPR. Just flash the ROM using the Odin patched version for it to work.
I am using a AT&T Note 10 with the Star Wars ROM and I just received the Android 10 update earlier tonight. You will still receive the OTA updates but they just might be for the unlocked version if you are okay with that.
AllTheWay said:
Use the Frija tool and download the Sprint variant of Android 10.
https://www.sammobile.com/samsung/g...SM-N975U1/SPR/download/N975U1UEU2BSLC/309277/
AFAIK you should still receive OTA updates
Click to expand...
Click to collapse
AllTheWay said:
It will still work. The SPR in the ROM stands for Sprint. Check the CSC file to confirm before you flash it. Just flash the ROM using the Odin patched version.
Click to expand...
Click to collapse
IF I flash again, without the usual included spr user data will my locked sprint still get OTA for jan and forward.
MASTERGRAD said:
IF I flash again, without the usual included spr user data will my locked sprint still get OTA for jan and forward.
Click to expand...
Click to collapse
For it to get the updates you need to use the CSC that came with the ROM you flash if that makes sense.
AllTheWay said:
For it to get the updates you need to use the CSC that came with the ROM you flash if that makes sense.
Click to expand...
Click to collapse
ok.
AllTheWay said:
For it to get the updates you need to use the CSC that came with the ROM you flash if that makes sense.
Click to expand...
Click to collapse
https://imgur.com/ZN8m6bX GUESS what just now
I have a question for anyone that may know more than me...
I have an unlocked sprint note 10 plus. Ive flashed it with XAA. So im on unlocked firmware on an unlocked sprint note 10. Im settings my csc shows this... tmk/tmk/spr. Im using metro pcs as the carrier. Where will my updates come from? Using sam info app, it shows the firmware as XAA and active csc as tmk. I have a bunch of avalible csc to use but i dont have the dialer codes with metro. I have inserted a att sim and i have the dialer code to change the csc. However when i put the metro pcs sim in, it goes back to tmk/tmk/spr.
Question 1: With tmk/tmk/spr, on XAA firmware, where will updates come from? Metro Pcs, sprint, or samsung?
Question 2: Are the csc codes tmk/tmk/spr correct being as i am on XAA firmware?
Thanks!

Question Flashing Unlocked Firmware on AT&T version

I have AT&T Pixel 6 Pro which is SIM unlocked and I have already unlocked the bootloader. Can I flash unlocked Pixel 6 pro firmware (factory image) on it instead of AT&T factory images?
There are different carrier specific firmwares released for a reason
miravision said:
There are different carrier specific firmwares released for a reason
Click to expand...
Click to collapse
What happens if we flash unlocked? I know there could be a reason, but could we possibly brick if we flash unlocked on AT&T?
ram4ufriends said:
What happens if we flash unlocked? I know there could be a reason, but could we possibly brick if we flash unlocked on AT&T?
Click to expand...
Click to collapse
There are only two versions of the latest firmware. Verizon, and non-Verizon. So yes, you should be able to flash the non-Verizon firmware fine. Probably no different from what you're on unless you haven't received the OTA to SD1A.210817.036 yet.
Even those with unlocked phones running on the Verizon network are fine to flash either version. Eventually, there will be only one firmware per month, just like they have for other Pixels.
I could probably flash my unlocked phone that I'm using on AT&T with the Verizon firmware and it would probably still be okay.
If you brick your phone, it's not because of which Raven (P6P) firmware you flash.

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