Possible to downgrade to stock Android PiE with older security patch? - Samsung Galaxy S8 Questions and Answers

I have an unlocked Samsung Galaxy S8 (G950F) on stock ROM, Android Pie, on security patch June 2019. Is it possible to downgrade it to stock ROM, Android Pie security patch March 2019 using the Odin method? I have already downloaded the appropriate firmware (G950FXXS4DSC2).

No u can't downgrade anymore , your bootloader is on v5 and there is no way currently to downgrade bootloader to older version

Thank you for your response. Theoretically would I be able to downgrade an S8 on the May 2019 update (G950FXXU4DSE4) to the March 2019 update (G950FXXS4DSC2)? If I am correct the digit after FXXU, i.e 4 represents the bootloader version, which is 4 in this case.
Scorpionea said:
No u can't downgrade anymore , your bootloader is on v5 and there is no way currently to downgrade bootloader to older version
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Antonis1983 said:
Thank you for your response. Theoretically would I be able to downgrade an S8 on the May 2019 update (G950FXXU4DSE4) to the March 2019 update (G950FXXS4DSC2)? If I am correct the digit after FXXU, i.e 4 represents the bootloader version, which is 4 in this case.
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Yes u can downgrade to any earlier pie or Oreo frimware as long u didn't install June update

I thought this was possible too. That's half the reason I rooted. A security update messed up my night mode and it's very annoying. Shame. I doubt Samsung will fix it with any future updates.

Related

Want to downgrade to an earlier 7.0

Since 7.0 came to the s7, I have been keeping up with the monthly updates the carriers push out but for the past couple of months I've been getting some terrible kernel wake locks and I've tried everything possible to prevent them but I can't find a solution. So my thought was downgrading to an earlier 7.0 where I didn't have that problem.
Now my question is: Has the bootloader been updated prior to the first 7.0 monthly update (march)? Because I've heard once the bootloader has been updated you can't go downgrade to an earlier bootloader and I've experienced a soft brick on my s7 edge while tried to downgrade to an earlier version of marshmallow and someone told me it was because of an update to the bootloader. The firmware i'm on now is G935W8VLU2BQH1 and I want to go down to G935W8VLU2BQB6 which is the first nougat update (march)
orlans21 said:
Since 7.0 came to the s7, I have been keeping up with the monthly updates the carriers push out but for the past couple of months I've been getting some terrible kernel wake locks and I've tried everything possible to prevent them but I can't find a solution. So my thought was downgrading to an earlier 7.0 where I didn't have that problem.
Now my question is: Has the bootloader been updated prior to the first 7.0 monthly update (march)? Because I've heard once the bootloader has been updated you can't go downgrade to an earlier bootloader and I've experienced a soft brick on my s7 edge while tried to downgrade to an earlier version of marshmallow and someone told me it was because of an update to the bootloader. The firmware i'm on now is G935W8VLU2BQH1 and I want to go down to G935W8VLU2BQB6 which is the first nougat update (march)
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Just download rom from sammobile, you will have all the files for downgrading.
MS420 said:
Just download rom from sammobile, you will have all the files for downgrading.
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I did that back in December while on 6.0.1 and odin failed then when rebooting I got a software error message
orlans21 said:
I did that back in December while on 6.0.1 and odin failed then when rebooting I got a software error message
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Well, I downgraded from 7.0 to 6.0 but with twrp, so maybe it's not possible via odin, but I flashed many times nougat via odin, from april to february security patch, it always worked..
MS420 said:
Well, I downgraded from 7.0 to 6.0 but with twrp, so maybe it's not possible via odin, but I flashed many times nougat via odin, from april to february security patch, it always worked..
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So then it's possible. As long as Samsung didn't update the bootloader between March and August then I should be good. Did you include BL in Odin when you downgraded to an earlier security patch?
orlans21 said:
So then it's possible. As long as Samsung didn't update the bootloader between March and August then I should be good. Did you include BL in Odin when you downgraded to an earlier security patch?
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Yes.
MS420 said:
Yes.
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Then they haven't updated it so far. When I wanted to go from 6.0.1 November security patch back to February security patch it failed and the phone went into a softbrick
orlans21 said:
Then they haven't updated it so far. When I wanted to go from 6.0.1 November security patch back to February security patch it failed and the phone went into a softbrick
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Well, if you have custom recovery, you can downgrade to 6.0.1 very easy..
MS420 said:
Well, if you have custom recovery, you can downgrade to 6.0.1 very easy..
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I've chosen not to root this phone so I just have stock recovery

Oreo beta

I try to install Oreo Beta 2 and it says older time stamp and degrade is unavailable. I researched a bit and found that I need to flash back to older firmware. I downloaded it from the STOCK thread but I couldn't sideload it. It says footer is wrong, sig verf failed and other stuffs. Im currently on the lastest firmware
Have you updated to the latest firmware with January security update if so that's why
r8dooo said:
Have you updated to the latest firmware with January security update if so that's why
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Yes, I have.
So there is no way to do it now?
You should be able to downgrade if your bootloader is unlocked.
loctuantran said:
Yes, I have.
So there is no way to do it now?
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I updated to latest security patch for January and unlocked bootloader and flashed to Oreo beta 2 no issues. Essential.com and do it step by step and should have no issues.

questions about the 7.1.1 update

Hi guys, I recently read about 7.1.1 being officially released, the thing is I already updated to Nougat via the soak test uploaded last year, should I revert to stock rom and get Nougat officially? How it is on performance quality?, Also, I'm on September security patch, do i have risk of bricking?
If you flash this through fastboot you will get 1 November 2017 security patch without having to downgrade. Then you may get December and February updates
https://mirrors.lolinet.com/firmwar...ubsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip
igna.98 said:
If you flash this through fastboot you will get 1 November 2017 security patch without having to downgrade. Then you may get December and February updates
https://mirrors.lolinet.com/firmwar...ubsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip
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How is your GPS on that firmware? Also, do you know if that firmware will work on the XT1607?
zahna said:
How is your GPS on that firmware? Also, do you know if that firmware will work on the XT1607?
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I'm not able to tell you how GPS works because I don't own the phone, I installed it in a friend's phone. And AFAIK it can be installed on all models except Verizon's XT1609. Tell me if it works for you
igna.98 said:
If you flash this through fastboot you will get 1 November 2017 security patch without having to downgrade. Then you may get December and February updates
https://mirrors.lolinet.com/firmwar...ubsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip
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will it work on xt1607 ?
UPDATE: I will try it, when i get back home.

From stock Oreo to custom ROM and back to stock Oreo???

I was on Oreo 85.13 pre-release...then I unlocked bootloader...and installed pixel experience...but meanwhile I formatted all data which ihave backed up..then I installed twrp flashable with June security patch zip..and I was on Android 7..then I flashed pixel experience..now..if I want to back on Oreo stock and to lock bootloader..what should I have To do...???I heard somewhere you need stock Oreo ROM zip where I can find one...???is that same one which we have used in manually updating to Oreo... please reply...
As far as I know the only stock Oreo zip we have is the OTA, which can't be used to flash firmware. We need the full firmware file before we're able to flash stock ROMs via fastboot.
Anyway, I'm also curious if there are any differences for the unlocking/flashing/backup process starting at the official Oreo we have now, and if going back to it later is the same as it is with Nougat.
The stock US OTA update can be found here: https://technoplanners.blogspot.com...tock-update-for-moto-g5-plus-OPS28.85-13.html
This can be side-loaded to upgrade after you've flashed Nougat with one caveat. Nougat has to be at Build number NPNS25.137-92. If your Nougat ROM has the June security patches (Build number NPNS25.137-93) you'll be SOL since the manifest specifies the pre-req for the update. So the fools at Motorola released the June update for Nougat, then released Oreo at the same security patch level and won't let you apply the update. Real geniuses.
nvrpayretail said:
The stock OTA update can be found here: https://technoplanners.blogspot.com...tock-update-for-moto-g5-plus-OPS28.85-13.html
This can be side-loaded to upgrade after you've flashed Nougat with one caveat. Nougat has to be at Build number NPNS25.137-92. If your Nougat ROM has the June security patches (Build number NPNS25.137-93) you'll be SOL since the manifest specifies the pre-req for the update. So the fools at Motorola released the June update for Nougat, then released Oreo at the same security patch level and won't let you apply the update. Real geniuses.
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That's not quite correct; the build required for this Oreo OTA that's currently around is NPNS25.137-92-14 (June 2018 security patch for Brazil and Indian devices). The NPNS25.137-93-14 patch you mentioned is the June 2018 patch for EU, US and Asian devices, which means the Oreo patch for those devices isn't around yet.
To the opening poster, as previously mentioned, you will have to wait for the OPS28.85-13 stock fastboot ROM to be leaked. You must lock with a stock firmware as new or newer than your current bootloader. You cannot downgrade bootloaders via fastboot anyway and it's really not recommended to downgrade.
The US patch is available (Blur_Version.28.51.16.potter.retail.en.US.zip). It can be downloaded from the link I provided.
Correction: My bad. Didn't realize "92" indicated India and "93" indicated US. Evidently the referenced download is labeled wrong

Current S6E+ status

What is the current official S6E+ stock rom status of never rooted, never custom rommed phone?
It has Nougat with the last security patch from...? or did something change?
androidbadboy said:
What is the current official S6E+ stock rom status of never rooted, never custom rommed phone?
It has Nougat with the last security patch from...? or did something change?
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I believe so , yeah, that's the one I'm on. Wouls love samsung to keep more updates but it is "old" phone now
Tigernmas said:
I believe so , yeah, that's the one I'm on. Wouls love samsung to keep more updates but it is "old" phone now
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Can You confirm that S6E+ has NOT received Android 8 Oreo?
Can You confirm that S6E+ latest security patch was from January 2019? If not from when?
androidbadboy said:
Can You confirm that S6E+ has NOT received Android 8 Oreo?
Can You confirm that S6E+ latest security patch was from January 2019? If not from when?
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Go to the sammobile website and enter model: "SM-G928F"
look at the top the newest firmware was released 2018-12-20 nougat 7.0
So no oreo.
And also before i rooted my new s6 edge+ i updated the phone yesterday and got no oreo. it was still nougat.
No new rom the last one nougat and also the last security patch last year 2018 no 2019 go to sammobile and check
SkylinesHD said:
Go to the sammobile website and enter model: "SM-G928F"
look at the top the newest firmware was released 2018-12-20 nougat 7.0
So no oreo.
And also before i rooted my new s6 edge+ i updated the phone yesterday and got no oreo. it was still nougat.
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Thanks, what is PDA and CSC,
how to know when was the last sec patch?
Adham_android said:
No new rom the last one nougat and also the last security patch last year 2018 no 2019 go to sammobile and check
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Can You tell me also:
Thanks, what is PDA and CSC,
how to know when was the last sec patch?
and for example for S7E that has Oreo + Samsung exp. is it possible to goo all the way back to original 6.0.1 cause I've heard that it may not be possible due to the fact that Android 6 has bootloader version 1 in Odin and since Nougat it has different version and if that happens you supposudly cant roll back bootloaders on samsung stocks
?

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