Is it possible to downgrade from Android Pie (9.0) to Oreo (8.1)? - Samsung Galaxy Tab S4 Questions & Answers

Is there any way to downgrade from 9 to 8.1? considering I've updated my bootloader I see no way back. I'm currently on SF4 hoping to go back to ARK4 any help is greatly appreciated.

as far as i know, once you upgrade the "U1" to another version ( liked me, upgrade from U1ARK4 to U3BSG4). There is No Way to downgrade to lower U version.
just like downgrade the ios i think.
---------- Post added at 01:35 PM ---------- Previous post was at 01:31 PM ----------
but I found some clue about downgrade that thing.
some people say that you need something called 'Roll-back package android 9 to 8 model T835' to odin flash before flash the lower zu firmware.

shinemonmond said:
as far as i know, once you upgrade the "U1" to another version ( liked me, upgrade from U1ARK4 to U3BSG4). There is No Way to downgrade to lower U version.
just like downgrade the ios i think.
---------- Post added at 01:35 PM ---------- Previous post was at 01:31 PM ----------
but I found some clue about downgrade that thing.
some people say that you need something called 'Roll-back package android 9 to 8 model T835' to odin flash before flash the lower zu firmware.
Click to expand...
Click to collapse
The only 8.1 firmware I've found on revision 3 is a combination rom. I find it pretty stupid that OEM Unlocking doesn't disable these checks. Im not the biggest fan of OneUI on a tablet. I would prefer Samsung Experience. Thanks for your help though.

I believe it depends on the botloader version you have.
Usually a new version of Android means a new bootloader version too. Not always though and if the lower version of Android (8.1) supports the bootloader you have installed in the newer firmware (9), then you should be able to regress.
If the bootloader isn't the same then you will end up with an error when flashing and need to reflash the newer firmware to get up and running again...

Related

Getting error: 7 while flashing LOS 15.1

I am on firmware 8.11.22 , currently have twrp orange. getting error 7 always while flashing LOS 15.1. is it coz of firmware? there is xiaomi's antirollback so is it safe to flash miui 8.9.14 firmware via miflash?
No, ARB Protection not implemented on Mix 2. Have you tried with another revovery?
Yes. Error 7 is always Firmware mismatch. Look up what version the ROM needs.
---------- Post added at 04:14 AM ---------- Previous post was at 04:09 AM ----------
Harshavarbm13 said:
I am on firmware 8.11.22 , currently have twrp orange. getting error 7 always while flashing LOS 15.1. is it coz of firmware? there is xiaomi's antirollback so is it safe to flash miui 8.9.14 firmware via miflash?
Click to expand...
Click to collapse
I have tried all the Roms for the phone and have used all. Currently back to default with root. Just Google Xiaomi Mi Mix 2 FW and get the latest one. LOS is Android 9.0, so you need the FW for Android 9.0.
I somewhat have the same problem but for me I get the Error 7 by trying to flash Omnirom 9.0 every damn time
Marlonese said:
I somewhat have the same problem but for me I get the Error 7 by trying to flash Omnirom 9.0 every damn time
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Click to collapse
Flash the latest FW for Omni Rom. Easy fix.
---------- Post added at 07:46 AM ---------- Previous post was at 07:29 AM ----------
Marlonese said:
I somewhat have the same problem but for me I get the Error 7 by trying to flash Omnirom 9.0 every damn time
Click to expand...
Click to collapse
Use FW 8.9.20+. The link to 8.9.20 is posted in OMNI forum. Or Google Xiaomi Mi Mix 2 Firmware and download the latest. Any ROM that is based on Android 9 will give you Error 7 ( Red text error) if you don't have the right FW.
Problem solved. Thanks for confirming that there is no anti rol back in mix 2. flashed fw 8.4.19 and flashed LOS. Enjoying the rom.

looking for factory images for nokia6.1

It would be great help to the community if someone could share factory images for this device of android 8 and 9. It can be use to reflash from scratch, or downgrade the device to android8 like me..
In most cases, what you need is boot, system or vendor images.
Here are dumps for Oreo: Gdrive
PIe: Gdrive
TheImpulson said:
In most cases, what you need is boot, system or vendor images.
Here are dumps for Oreo: Gdrive
PIe: Gdrive
Click to expand...
Click to collapse
I need thos images which i could use to flash my device. Actually i want to downgrade to orio, as i am not happy with pie. Can u help?
still waiting for response
I am in the same boat, I want to downgrade to Oreo 8.0 so I can unlock the bootloader. I found this website where the firmwares are available, thanks to the owners but I am not able to downgrade because it either gets stuck on 'abl_b' partition or fails. I have tried to use OST tool 6.0.4 with slightly edited firmware as I found on internet.
https://fih-firmware.hikaricalyx.com/index_en.html
You need Ntool for downgrade ur phone.
Also here are stock images: https://forum.xda-developers.com/no...de-how-to-make-backups-restore-stock-t3889815
Same here. I updated to pie but unhappy with it due to poor battery life and stability. I want to downgrade too.
---------- Post added at 10:35 AM ---------- Previous post was at 10:29 AM ----------
I came across a downgrade method for 7 plus where you just need to change slot from a to b. Then you flash downgrade package in stock recovery by applying update (in reality downgrade) from sdcard. Ii doesnt need bootloader unlocked. search google "How to downgrade Nokia 7 Plus from stable Pie to stable Oreo" (not allowed to post link because the site sells bootloader unlock).
if we had an oreo downgrade package for 6.1 we could try this method.
Windoors said:
Same here. I updated to pie but unhappy with it due to poor battery life and stability. I want to downgrade too.
---------- Post added at 10:35 AM ---------- Previous post was at 10:29 AM ----------
I came across a downgrade method for 7 plus where you just need to change slot from a to b. Then you flash downgrade package in stock recovery by applying update (in reality downgrade) from sdcard. Ii doesnt need bootloader unlocked. search google "How to downgrade Nokia 7 Plus from stable Pie to stable Oreo" (not allowed to post link because the site sells bootloader unlock).
if we had an oreo downgrade package for 6.1 we could try this method.
Click to expand...
Click to collapse
If you are critical unlocked, you can downgrade via OST LA. If not, you need NTool for downgrade.
I also tried to adb sideload through recovery the Oreo update but it also didnt work because it said the timestamp is older than current one. May be if we can change the time stamp it would just flash the update.
ahmar16 said:
I also tried to adb sideload through recovery the Oreo update but it also didnt work because it said the timestamp is older than current one. May be if we can change the time stamp it would just flash the update.
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Click to collapse
Where did you find the oreo update file?
Windoors said:
Where did you find the oreo update file?
Click to expand...
Click to collapse
There you go https://fih-firmware.hikaricalyx.com/index_en.html
¥sBielefeld said:
There you go https://fih-firmware.hikaricalyx.com/index_en.html
Click to expand...
Click to collapse
but isn't that the whole firmware rather than the update file? Or are they same? Sorry i am new and don't know much regarding Nokia firmwares.
Windoors said:
Where did you find the oreo update file?
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I am not sure if it's actually from Oreo because could be Pie, but the file name is "PL2-3260-0-00WW-B01-update" and it's size is 1.42Gb. I found it while I was looking for stock firmware for my Nokia 6.1. I dont remember from where though.
Windoors said:
but isn't that the whole firmware rather than the update file? Or are they same? Sorry i am new and don't know much regarding Nokia firmwares.
Click to expand...
Click to collapse
PL2-222E-0-00WW-B02 PL2 Global 8.1.0 July 2018
This is the full firmware
Sorry, i read ur message wrong... my bad.

How to enable SM-G960U carrier unlocked AT&T to update in a different country

Hi,
Last month (December 2018), I purchased a US carrier unlocked AT & T version of a Samsung S9 (SM-G960U) . I am currently residing in a different country, and everything works fine - except there are no updates! The last security patch level update is July 1, 2018. Everytime I check for software updates, it says the software is up to date. Is there any way to update to the latest firmware?
If you aren't/won't use any of the AT&T features you can flash your device to run the unlocked firmware(which pulls it's updates from Samsung). Look at this thread: https://forum.xda-developers.com/galaxy-s9/how-to/how-to-flash-u1-firmware-to-device-t3765200
ajairola said:
If you aren't/won't use any of the AT&T features you can flash your device to run the unlocked firmware(which pulls it's updates from Samsung). Look at this thread: https://forum.xda-developers.com/galaxy-s9/how-to/how-to-flash-u1-firmware-to-device-t3765200
Click to expand...
Click to collapse
Thank you so much! I think I will do just that, as long as the firmware gets updated. I had one more question if that's okay, does the PDA/CSC version matter? If I install for example the G960U1UEU3ARL1 version, will it cause any problems?
Masnoon91 said:
Hi,
Last month (December 2018), I purchased a US carrier unlocked AT & T version of a Samsung S9 (SM-G960U) . I am currently residing in a different country, and everything works fine - except there are no updates! The last security patch level update is July 1, 2018. Everytime I check for software updates, it says the software is up to date. Is there any way to update to the latest firmware?
Click to expand...
Click to collapse
Hey I have the same exact issue, can you tell me the steps you took to switch to the U1 version? Not sure if flashing to the U1 version has the same steps as just flashing to another U firmware
Youknowwhoiam19 said:
Hey I have the same exact issue, can you tell me the steps you took to switch to the U1 version? Not sure if flashing to the U1 version has the same steps as just flashing to another U firmware
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Click to collapse
Hi, I just recently updated to the U1 version, and it works like magic. I'm getting all the updates (finally), and it works smooth as butter. I download the firmware and followed this tutorial -
https://www.youtube.com/watch?v=SVhR0E9ACnY
Remember to flash Home_CSC if you want to keep your previous data/apps.
Can you tell me which version of odin you used?
I've tried two versions but it's not working for me
---------- Post added at 04:04 PM ---------- Previous post was at 04:03 PM ----------
Masnoon91 said:
Hi, I just recently updated to the U1 version, and it works like magic. I'm getting all the updates (finally), and it works smooth as butter. I download the firmware and followed this tutorial -
https://www.youtube.com/watch?v=SVhR0E9ACnY
Remember to flash Home_CSC if you want to keep your previous data/apps.
Click to expand...
Click to collapse
Can you tell me which version of odin you used?
I've tried two versions but it's not working for me
Youknowwhoiam19 said:
I've tried two versions but it's not working for me
---------- Post added at 04:04 PM ---------- Previous post was at 04:03 PM ----------
Can you tell me which version of odin you used?
I've tried two versions but it's not working for me
Click to expand...
Click to collapse
Hi, I used the one modded by Raymond. I think that one works fine.
https://androidfilehost.com/?fid=962187416754471383
update links please not working
no links work at all

can i downgrade?

hi everybody i recently purchased this g710em and out of the box i found the pie update so i did install it right away but i am very disappointed coming from an xz2 which was very snappy like realy snappy compared to the g7 and i didn't try oreo yet my request for you guys eas if u any one can hzlo or share his experience:
_can i downgrade to oreo.
-(if yes) is oreo better than pie.
-what is the latest oreo firmware or the most accomplished one.
i really like the audio capabilities and the build quality of the g7 but i cant keep it withe this kind major problem wich lag in the very basic ui. thank you. very much in advance.
If it is rootable then proceed to root and use a non stock rom that is oreo based.
Unless someone has made a stock backup you can restore via twrp.
i did downgraded with lgup to the g710em10s everything seem fine sim card speed no stuttering anymore even while installing 170 app from playstore ram management now i have 1.1 gb free ram while in pie i had only 400mb or 500 mb switching between apps via recent button seem snappier i let guys now about the sot battery.
Can you provide some more details about the procedure. I am complete newbie and couldnt figure out.
Not running pie makes u exposed to som nasty explots.
But a aosp shuld be faster even android 10
---------- Post added at 11:35 AM ---------- Previous post was at 11:34 AM ----------
loonycgb2 said:
If it is rootable then proceed to root and use a non stock rom that is oreo based.
Unless someone has made a stock backup you can restore via twrp.
Click to expand...
Click to collapse
Whye go thru the jobb with unlock and twrp when u can downgrade with lgup and a kdz
yes u can do it with lg up ,nothing wrongs
Can anyone else confirm that downgrading from Android 9 Pie to Android 8.0/8.1. Oreo is safe?
4imb0t said:
Can anyone else confirm that downgrading from Android 9 Pie to Android 8.0/8.1. Oreo is safe?
Click to expand...
Click to collapse
No its not safe.. Your phone is easely exploited wintout security patches

custom roms on an S9 (SM-G960W)

I've got a stock SM-G960W (Snapdragon) running android 10 and want to switch to a custom rom, preferably something more privacy oriented. What are some good options? I've seen lots of guides on rooting+flashing the Exnyos variant of the S9, but not the one I have. Thanks!
I do not believe the (SM-G960W) can be rooted, has not changed so there are no options for custom roms
---------- Post added at 06:20 PM ---------- Previous post was at 06:16 PM ----------
nordial said:
I've got a stock SM-G960W (Snapdragon) running android 10 and want to switch to a custom rom, preferably something more privacy oriented. What are some good options? I've seen lots of guides on rooting+flashing the Exnyos variant of the S9, but not the one I have. Thanks!
Click to expand...
Click to collapse
Did you see this thread?
https://forum.xda-developers.com/ga...s-recoveries--other-development/root-t4043707
y'all i'm still searching for a custom rom for g960w or an android 11 update port, android 10 feels pretty old for me tbh

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