Question cannot roll back to earlier version of firmware - Samsung Galaxy S21+

Hi,
I've got a S21+ and it updated itself to One UI 5.1 and I am finding that Android Auto is not working, so I just tried to roll back to a previous firmware version using Odin and gives a message that says "LDFW" and does not proceed.
Does anyone know why this is? Have I perhaps chosen the wrong version of firmware to roll back to?
Thanks,
Ackoman

Related

Canadian S6 - Trying to Downgrade

Hi all,
I have an S6 that I am trying to downgrade. It is on 6.0.1 but reboots randomly multiple times a day. I downloaded 5.0.2 stock firmware for Bell and tried to flash via Odin but receive the following error:
sw rev. check fail device 4 binary 1
Not 100% sure what it means. I think the device 4 means that it has been updated and can't be reverted to a lower firmware. If I am wrong, hopefully someone can correct me or provide some guidance. I have already tried clearing the cache and using smart switch to reload the os.
Model is G920W8.
Yeah, I'm on the same boat. I would love an expert to correct me if I'm wrong, but I think once you are past a certain revision of Marshmallow there's no turning back and you basically have to stick with your firmware or move on to a newer one.
You can't downgrade 5.0.2 or 5.1.1 anymore.
Damn, I thought so. If anyone else has ever resolved the random reboot I would love to hear about it. It's such a pain.

Manually updating to Oreo

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?

AT&T Galaxy S8+ OTA software update not working / alternative way. SOLVED

What I want to do: I was trying to OTA update my phone software to the latest, but it seems I am behind on many updates. On the AT&T website, I saw that I need the previous updates installed first, in order to get the latest ones. I have to go in order.
Problem: Every-time I try to do a software update from the settings, it says “Current software is up to date.” It’s been saying that for over a year now. I can’t even get the updates from last year.
So is there a way I can flash one of the stock firmware updates from last year on to my phone with Odin and see if it will fix the ‘over the air’ updates? Or can I just skip to the most recent firmware and flash that one.
By the way, I have never done anything like this to my phone before, so I am a bit nervous, but I want to get this problem fixed so I would love if someone helped me out. I did see some articles online about flashing stock firmware, that’s how I learned about Odin.
If this is doable, can someone please link me to a thorough tutorial on this process? If it isn’t, can you guys recommend another way of getting to the latest 8.0 stock firmware?
My phone:
Galaxy S8 plus (AT&T)
Model#: SM-G955U
Android version: 7.0
Baseband version: G955USQS1AQF7
Android security patch level: June 1, 2017
Kernel version: 4.4.16-11449429
My phone isn't unlocked.
Zendrop said:
What I want to do: I was trying to OTA update my phone software to the latest, but it seems I am behind on many updates. On the AT&T website, I saw that I need the previous updates installed first, in order to get the latest ones. I have to go in order.
Problem: Every-time I try to do a software update from the settings, it says “Current software is up to date.” It’s been saying that for over a year now. I can’t even get the updates from last year.
So is there a way I can flash one of the stock firmware updates from last year on to my phone with Odin and see if it will fix the ‘over the air’ updates? Or can I just skip to the most recent firmware and flash that one.
By the way, I have never done anything like this to my phone before, so I am a bit nervous, but I want to get this problem fixed so I would love if someone helped me out. I did see some articles online about flashing stock firmware, that’s how I learned about Odin.
If this is doable, can someone please link me to a thorough tutorial on this process? If it isn’t, can you guys recommend another way of getting to the latest 8.0 stock firmware?
My phone:
Galaxy S8 plus (AT&T)
Model#: SM-G955U
Android version: 7.0
Baseband version: G955USQS1AQF7
Android security patch level: June 1, 2017
Kernel version: 4.4.16-11449429
My phone isn't unlocked.
Click to expand...
Click to collapse
You can Odin flash CRG3 and the next OTA should be CRHI, so once you go thru settings, check for updates it should want to go to CRHI. And then you should be in the Update path to receive OTA's automatically
Josephigloe said:
You can Odin flash CRG3 and the next OTA should be CRHI, so once you go thru settings, check for updates it should want to go to CRHI. And then you should be in the Update path to receive OTA's automatically
Click to expand...
Click to collapse
Thanks, so is it okay to flash it with the latest version of Odin? Also, do you mind linking me with an up to date / reliable tutorial on this? This is my first time attempting to do something like this.
One more thing, on Sammobile, there is only one firmware available for at&t, and it's the oldest one.
https://www.sammobile.com/firmwares/galaxy-s8-plus/SM-G955U/ATT/
Zendrop said:
Thanks, so is it okay to flash it with the latest version of Odin? Also, do you mind linking me with an up to date / reliable tutorial on this? This is my first time attempting to do something like this.
Click to expand...
Click to collapse
https://drive.google.com/folderview?id=1okPBAupxRljTcSPI70ZVv7KqrccKNqwU
This is a patched odin.
Odin instructions.
https://www.xda-developers.com/update-firmware-any-samsung-phone/
Josephigloe said:
https://drive.google.com/folderview?id=1okPBAupxRljTcSPI70ZVv7KqrccKNqwU
This is a patched odin.
Odin instructions.
https://www.xda-developers.com/update-firmware-any-samsung-phone/
Click to expand...
Click to collapse
Okay, and is it okay if I flash from a firmware from May 2018? It's about 4 months old. Would I be able to OTA update from there on? Also, what is AT&T userdata? I came across it in this thread and I was wondering. https://forum.xda-developers.com/att-galaxy-s8+/how-to/g955u-att-stock-odin-files-firmware-t3769140
Zendrop said:
Okay, and is it okay if I flash from a firmware from May 2018? It's about 4 months old. Would I be able to OTA update from there on? Also, what is AT&T userdata? I came across it in this thread and I was wondering. https://forum.xda-developers.com/att-galaxy-s8+/how-to/g955u-att-stock-odin-files-firmware-t3769140
Click to expand...
Click to collapse
Yes you can use this firmware and start to receive updates, User data I'm not 100% sure but I think its supposed to flash your data so you wont have to reinstall everything but I heard it dosent work for At&t it will still do a complete wipe before install.
Josephigloe said:
Yes you can use this firmware and start to receive updates, User data I'm not 100% sure but I think its supposed to flash your data so you wont have to reinstall everything but I heard it dosent work for At&t it will still do a complete wipe before install.
Click to expand...
Click to collapse
I flashed it and it works great so far. Thanks for all the help! The OTA update also seems to be working!

How do i revert my Samsung S8+ firmware to the correct version?

A while back i had tried installing the android pie update for my samsung s8+ in canada and of course it did not work. As always samsung takes 100000 years to put out an update and its still not here. Anyways i havent received any updates since and my software version is probably not right. I was wondering if it will automatically update when android pie comes out or if it wont update at all. Also the device security isnt working so thats a bad thing thats why i want to try and revert it. Thanks, sorry for the unclarity if any.
nandakoitsu said:
A while back i had tried installing the android pie update for my samsung s8+ in canada and of course it did not work. As always samsung takes 100000 years to put out an update and its still not here. Anyways i havent received any updates since and my software version is probably not right. I was wondering if it will automatically update when android pie comes out or if it wont update at all. Also the device security isnt working so thats a bad thing thats why i want to try and revert it. Thanks, sorry for the unclarity if any.
Click to expand...
Click to collapse
And the software for which version did you flash exactly? I assume you have a G955W variant? If so then it should be as easy as downloading the latest firmware from fw.updato.com or search Google for Samfirm and use it to download the latest firmware for your phone. Flash via Odin and it should be back to normal.
L3R0N said:
And the software for which version did you flash exactly? I assume you have a G955W variant? If so then it should be as easy as downloading the latest firmware from fw.updato.com or search Google for Samfirm and use it to download the latest firmware for your phone. Flash via Odin and it should be back to normal.
Click to expand...
Click to collapse
The baseband version I have is G955USQS5CRL1, which is weird cause I downloaded the G955W software... Build number is R16NW.G955USQS5CRL1

[RESOLVED] Updating to Pie

Ok. I got an AT&T Galaxy Note 8 back in early-mid 2018. The first thing that happened when I booted it up and connected to a wifi hotspot was that it downloaded the latest update.
That was the last update I received.
I am trying to install Android P onto my device through Odin (Using 3.13.1B PatcheD). I tried OTA first, but when checking for updates, it says that my phone is up to date. I am currently on build U4CRD7.
I called AT&T and they told me that I have to contact Samsung to download the update, and also that it could be a hardware issue (?) and to possibly send it in to Asurion. After that, I called Samsung, and they told me I had to take it to the closest Best Buy. Now, I don't have a way to travel the ~30 miles to the closest one. So, I decided to try Odin. (I have used Odin before, so I am somewhat familiar with it)
I downloaded firmware version U7DTC1_USC from a post here on the forums. I placed all files in the correct areas, went to download mode, tried flashing, and failed. I've gotten three different fails. I changed cables and ports and failed. I tried downloading firmware version U7DSK3 and flashing that one, thinking I might have skipped too many updates (if that is a thing... I've read conflicting information). Failed.
The last failure was a "Complete(Write) operation failed"
Besides taking an expensive rideshare to the nearest Best Buy, is there something that I am missing in trying to update this phone? Could it be a hardware issue? Have I missed too many updates? Do I need to progressively update my phone? (I don't need answers to all these questions, just the most relevant answer please)
If I have posted this in the wrong area, I am sorry. This is my first post on XDA, and I usually don't post in forums anywhere, I just lurk and look for answers to my questions. I haven't been able to find a matching problem.
Edit:
More digging and I found this in another thread.
MrMike2182 said:
...You need to manually update it yourself to the next update version which I think is ... using Odin and then it'll be able to do it on it's own.
Click to expand...
Click to collapse
In further replies, he suggests updating to the firmware version that I am currently at. What is an "update version?" Do I need to just go one firmware update up? Do I need to go one BL version up?
Phone successfully updated
So, I downloaded firmware version U5DSC1, dug up my 10 year old laptop and switched from the patched version to the normal Odin3 3.13.1.
I don't know which change allowed the update, but I was able to update.
After U5DSC1, I had no problem updating to U7DTC1 through Odin (though the system update feature on the phone still did not pick up any updates after U5DSC1).
G-Man Cometh said:
So, I downloaded firmware version U5DSC1, dug up my 10 year old laptop and switched from the patched version to the normal Odin3 3.13.1.
I don't know which change allowed the update, but I was able to update.
After U5DSC1, I had no problem updating to U7DTC1 through Odin (though the system update feature on the phone still did not pick up any updates after U5DSC1).
Click to expand...
Click to collapse
Your problem was simply because you were trying to use the patched version of Odin and should have just used the newest updated version of Odin. There's no reason to use the patched Odin to flash the normal firmware. People use the patched Odin when they're flashing modified firmware.
Edit: By the way, if it's an AT&T device and you're using say a T-Mobile or Verizon sim card it will not update unless you put an AT&T sim card back in it. It's apparently picky like that. For instance let's say it had AT&T firmware on it and you have a Verizon(or other) sim card in it, the phone is expecting to find and download the AT&T firmware for updates the problem is that Verizon(and others) do not carry AT&Ts firmware they only have their own versions of firmware that's the reason some people don't get updates.

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