I bought the unlocked USA version of the S8+ (SM-G955U1), and it came stock with Oreo/8.0. I've tried multiple times to flash firmware with Nougat so that I can downgrade and root, because all other firmware for Oreo doesn't work. I don't know if the process is unsuccessful for me because the phone wasn't ever updated from 7.0 to 8.0 or what, but at this point I'm willing to resend this phone and just the Internantional/Exynos version if nothing else works.
Thanks for the help regardless.
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Hi.
I have a G955U Galaxy S8+ AT&T Factory Unlocked on Android 7.0
Baseband Version: G955USQU1AQD9
Android Security Patch Level - April 1, 2017
I no longer live in the US, and currently in the Philippines. Phone works great and the signal is too and all, but I cannot get OTA updates.
Can I just download the firmware file in this thread and flash straight through ODIN, or do I need to follow another guide?
Thanks in advance
You can, however there are specific sequences to follow, so you have to update in firmware released order.
I encountered the same problem so I downloaded odin that worked for Nougat and loaded all version to BRB1 I think it is and then went to Oreo. Currently on CRC5.
Another note, when you are about to hit Oreo you will need to download the odin that works for Oreo. It can be found in the CRC5 thread.
Happy Updating
onedonrazor said:
You can, however there are specific sequences to follow, so you have to update in firmware released order.
I encountered the same problem so I downloaded odin that worked for Nougat and loaded all version to BRB1 I think it is and then went to Oreo. Currently on CRC5.
Another note, when you are about to hit Oreo you will need to download the odin that works for Oreo. It can be found in the CRC5 thread.
Happy Updating
Click to expand...
Click to collapse
Is this really necessary?
I want to update to Oreo as well but since I'm AT&T unlocked and not currently using AT&T network I'm stuck in the June software update so I'll have to flash like 7-8 firmware updates and each one being about 2-3 GB to download.
Also, is there any stock Samsung firmware I can download so I can avoid having to manually flash every software update? Or am I just stuck with the AT&T firmware?
Thanks in advance.
I'm also having this problem. Need to flash the updates through ODIN but I can't find every single stock file leading up to BR9 on this site. Do I really have flash them all? Or is there another way?
Hey so.. Phone's root bugged out yesterday and I downloaded twrp and decided I should upgrade it to Android 8.0 then root it. After many hours of failures I managed to flash a 8.0 but I couldn't make the CSC to work, since my phone is region locked to another country so I decided to go back to 7.0 and try again.. but now here it gets complicated because I really don't know what to do. I'm not sure how exactly to go back from 8.0 to 7.0.. Can someone give me detailed steps on what should I do.. I'd be very grateful!
PS. I don't know if I'm posting this in the right forum thread.
Here https://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin
Same site, or sammobile can be used to get the firmware files to flash with Odin
Note: The last version of 7.0 locked the ability to downgrade, I haven't gone to Oreo so can't confirm, but it ability to downgrade may also be removed from Oreo.
Beanvee7 said:
Here https://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin
Same site, or sammobile can be used to get the firmware files to flash with Odin
Note: The last version of 7.0 locked the ability to downgrade, I haven't gone to Oreo so can't confirm, but it ability to downgrade may also be removed from Oreo.
Click to expand...
Click to collapse
I can confirm, downgrading from Oreo 8.0 to Nougat 7.0 is possible, even without tripping knox.
It's just flashing the previous firmware with odin and factory reset the phone before first run and you're fine to go
My smartphone only received two OTA updates (140-150mb each) but its not receiving the oreo update. I'm still stuck on nougat and the package disabler app is now patched out with bootloader 3
My ATT note 8 is version sm-n950u with baseband N950USQS3BRA8. It is carrier locked at the moment. I ran into this thread with different oreo update versions but I don't know which one to select. I don't want to brick my smartphone by flashing the wrong oreo update.
Which oreo update is the right one for my device and which odin version do I use?
DarkkEnergy said:
My smartphone only received two OTA updates (140-150mb each) but its not receiving the oreo update. I'm still stuck on nougat and the package disabler app is now patched out with bootloader 3
My ATT note 8 is version sm-n950u with baseband N950USQS3BRA8. It is carrier locked at the moment. I ran into this thread with different oreo update versions but I don't know which one to select. I don't want to brick my smartphone by flashing the wrong oreo update.
Which oreo update is the right one for my device and which odin version do I use?
Click to expand...
Click to collapse
https://forum.xda-developers.com/at...n950u-stock-n950usqs5crf6-odin-files-t3821222 and https://androidfilehost.com/?fid=818070582850505662
Id like to downgrade my S7 from nougat to marshmallow. My current lowest factory reset option is nougat on bootloader version 3. Id like to downgrade to a downloaded stock firmware that uses version 1 of the bootloader.
my device is currently rooted and carrier unlocked
ive made a full backup of the nougat system, before ive done anything to it other than the rooting.
ive been reading around that some people were able to bypass the downgrade bootloader lock error in odin by first going into their desired downgraded firmware tar files and deleting any file that ends in .bin , and then successfully been able to flash the older firmware. what I want to know is if i decide to try this, and it still doesnt work in odin, or something still doesnt work properly - am i still able to fully restore from that backup ive just made? has anyone done this without issues? i hate the look and feel of nougat and oreo looks and feels the exact same...
i did make another thread about downgrading, but i didnt know nearly as much at the time. Been told downgrading is impossible and thats true, officially speaking. Id just like to know if anyone has been successful with this workaround.
What model, SM-G930F? Is OEM Unlocking turned on?
If it's a G930U/V/T/A/P then you won't be able to.
For the G930F so long as you don't have the latest Nougat version it shouldn't prevent downgrading. Otherwise upgrading up to Oreo then back down just by flashing in Odin should work, as Oreo doesn't have the downgrade lock that the newest Nougat has.
Beanvee7 said:
What model, SM-G930F? Is OEM Unlocking turned on?
If it's a G930U/V/T/A/P then you won't be able to.
For the G930F so long as you don't have the latest Nougat version it shouldn't prevent downgrading. Otherwise upgrading up to Oreo then back down just by flashing in Odin should work, as Oreo doesn't have the downgrade lock that the newest Nougat has.
Click to expand...
Click to collapse
model is sm-g930w8 but yes OEM unlocking is on, and so is usb debugging just to be on the safe side. It is running the very first version of nougat right now, 7.0. But the security patch is from feb 2018. Ive read that the bootloader itself is unlocked on this version of the phone though, its just that downgrade protection in the software that could get in the way, if what i read was correct? in the same place was where i read that deleting those bin files from the firmware i want to install would be a good workaround, it would make the bootloader not check it at all if i read it correctly.
i havent tried anything yet, ive been doing my research first to stay on the safe side. it might work without issues, but I want to be prepared for if issues do arise, what the correct next step should be to keep the device itself not bricked
Yea not 100% sure for the G930W8, it's the same SoC as the G930F but the firmware restrictions could be different since it's the Canada specific version
so, i decided to brave it and try it, since to read around you find alot of conflicting information... i was suspecting that odin would fail shortly after starting at sboot.bin if it was the bootloader thats the issue. but it didnt. it failed the very next step after that at param.bin.
anyone happen to know what param.bin means?
What files are you trying to flash? I have had the same problem, even though the bootloader is unlocked the device has efuses that prevent downgrade to older binary. I was using U2 binary and only managed to downgrade to nougat u2 binary version. Even when I skipped bootloader files, marshmallow would still give an error that system.img is version 0 where as device is v1
No baseband imei or service try this.
I HAVE SUCCESFULLY WENT BACK FROM PIE TO OREO ON S9 PLUS.Tried just going back to newest firmware it didn't work phone would loose sim card access.So i found that by flashing SM-G965U_G965USQS3ARI6_Official Firmware. Then immediately after flash go to recovery and do the update from sd to ari6 to brj3 then let it update sim now detected.Back on oreo now everything working again.Let me know if this helps anyone.
Required files https://samsung.firmware.science/download?url=52759/1488/SS-G965USQS3ARI6-to-U3BRJ3-UP
Thanks to rmarinella Found ARI6 Here https://forum.xda-developers.com/galaxy-s9-plus/how-to/sm-g965u-g965usqs3ari6-sm-g965u1-t3853429
Modded ODIN also FOUND THERE
do you know if this will work on sprint samsung s9 plus?
upgraded to pie using ota and tried to downgrade using this method on my ATT s9 plus. didn't work for me.