Galaxy S9+ downgrade - Samsung Galaxy S9+ Questions & Answers

How do I downgrade the SM-G965U1 to an earlier firmware to get the One UI Beta on my phone? My phone is on G965U1UES3ARJ6. I need to get it to an earlier firmware, but I do not know which one.

https://forum.xda-developers.com/galaxy-s9-plus/how-to/official-pie-beta-ota-files-factory-t3868977

Related

Problem flashing an earlier firmware

Is it possible to flash an earlier firmware than is on my Edge?
I had 3 UK firmware, latest version. Probably 5.1.1 or similar.
I flashed the UK non branded Marshmallow firmware. I wasn't impressed so tried to flash the 3 UK firmware back but although Odin says it succeeded without problems, the phone just boots over and over.
So, I re-flashed the marshmallow UK firmware and it is working again.
I would like to return to the earlier 3 UK firmware if it is possible.
Can it be done or am I stuck with marshmallow?
I would say yes you are unless im mistaken
Sent from my SM-G925P using Tapatalk
Oh well, I will have to get used to it until a 3 UK version of marshmallow is available.

Downgrading firmware

I have a galaxy tab A sm-t380 and I'm trying to downgrade the firmware from 7.1.1 to 6.0. I looked online and the only firmware I could find was the latest firmware or the second to oldest firmware. Does anyone here know where I can get older firmware for this particular tablet? Any help is much appreciated.
nestor makhno said:
I have a galaxy tab A sm-t380 and I'm trying to downgrade the firmware from 7.1.1 to 6.0. I looked online and the only firmware I could find was the latest firmware or the second to oldest firmware. Does anyone here know where I can get older firmware for this particular tablet? Any help is much appreciated.
Click to expand...
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The tablet came out in 2017 so this tablet is too new for offcail 6.0 and this device has no custom roms so I can't help you.

Is it safe fo flash a Samsung G970U with a G970U1 firmware?

Is it safe fo flash a Samsung G970U with a G970U1 firmware? Is there any chance of it bricking my phone? My phone's current code is G970USQU2BSIO, and the new firmware one's is G970U1UES3CTA3. Are this firmwares cross compatible for Samsung S10E or will it brick my phone? Thank you in advance
I'd like to know as well. Got an AT&T S10e SM-G970U not too long ago, sim unlocked it but would want to switch to a SM-G970U1 XAA firmware thats free of any carriers and can get the latest updates asap.

Samsung Galaxy S9+

Hi All
I used to use this site for my old HTC phones a long time ago. Saw a recent post about someone who had got a new ebay phone. I got one for my son but think the firmware is not UK-based whereas I am, so obviously he is. The firmware is from June 2019 and it's not self-updated. We're using a sim only deal with Giff-Gaff (probably)
SM-G965U S9+ Software G965USQS6CSGB / G965UOYN6CSGB /G965USQS6CSGB
Is this a UK firmware? If it is a US firmware, can I flash it with a UK firmware, as long as it's for the SM-G965U Galaxy S9+ ROM?
Thanks ahead of time to any of you that answer. Used to firmware- flash lots of previous phones and a bit (a lot) rusty on flashing a new Samsung S9+
I have what looks to be the same phone. It is supposed to be an unbranded (as in no mobile carrier) unlocked phone. I have my doubts about that even though there is no carrier software installed. The SM-G965U is a US model. From searching on G965USQS6CSGB, it appears the firmware is for the T-Mobile network. My phone is also stuck on the July 2019 patch update with no available updates. Samsung support says there is no update available. So far, I have been unable to update the firmware.

S8+ G955FD Exynos

hi
i have update S8 plus to last firmware Android9
so i try to downgrade back to android8 by using odin
i got problem about downgrade failed becasue bootloader device12 BInay 13
my basebad =G955FXXUVCDUD1
so does my bootloader is "C"
so where can i find OREO stock firmware with C
i read from previous post. it is problem about bootloader of my firmware is newer than fimrware of android9.
samsung try to not allow us downgrade.
the problem is my S8+ with android9 is horrible slow and freeze lag so often. how can i possible to downgrade into android8
thank so much

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