Downgrade with Combination File? - Samsung Galaxy S9 Questions & Answers

Does anyone know if its possible to downgrade from U2 to U1 with a combination file?

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Firmware only file?

Can anyone make and post a firmware only Odin flashable file?
Or maybe link me a tutorial that I can try and make one myself?
Flashfire can flash the new firmware from Sammobile but need to flash the bootloader etc from Odin to get it to boot.
Can anyone help me with this? Please...
Has anyone tried this yet? I don't have time to setup a new Linux install or I would. This might work. At least it used to.

A3 (2017) CanĀ“t flash stock rom with Odin. Bootloader problem???

Hello,
I have a question about flashing stock rom.
On my phone the installed firmware is PDA: A320FXXU3BRA1 (Russia, Android 7.0)
Now I want to install PDA: A320FXXU2BQI3 (Emirates, Android 7.0)
But it doesn't work with Odin.
Has anyone an idea why I have problems to flash this firmware? Maybe it is a problem of the bootloader but I don't know exactly.
How do I know which firmware has which Bootloader?
Thanks a lot
Karlonimo said:
Hello,
I have a question about flashing stock rom.
On my phone the installed firmware is PDA: A320FXXU3BRA1 (Russia, Android 7.0)
Now I want to install PDA: A320FXXU2BQI3 (Emirates, Android 7.0)
But it doesn't work with Odin.
Has anyone an idea why I have problems to flash this firmware? Maybe it is a problem of the bootloader but I don't know exactly.
How do I know which firmware has which Bootloader?
Thanks a lot
Click to expand...
Click to collapse
Please provide the errors that pop up in your Odin client and if you see any errors in the screen of download mode ... Like if something new appears
install without the BL file
You're trying to flash an U2 firmware over U3, which is a downgrade of binary version. The secure bootloader won't allow it.
You need an U3 firmware, or try flash U2 without BL & CP parts.
Thank you so much caiquess95 & tys0n.
That works perfect.
When I flashed the U2 Firmware without the BL & CP File is it after that possible to flash the phone a second time again with all the files (AP, BL, CP, CSC)?

Donwgrading

Can anybody help me how can i downgrade to older firmwares but flash tool is not working I'm currently on ZVF

Convert G9600 to G960U

I have a rooted G9600 currently running G9600ZCU3ARG4. I'd like to flash an Android P G960U rom to my device. Is it possible to flash a G960U rom via patched Odin to my phone? If so, can someone tell me exact steps? Thanks!

U to U1 Firmware Flash Fails

I have a Note 10+ 975U. It was orignally though Sprint, then T-Mob, and now unlocked so I wanted to flash the U1 firmware in odin, but it fails. To my knowledge, the U and U1 firmware should be interchangeable? Is this due to the bootloader lock?
Odin says:
<ID:0/005> FAIL! SHA256 is invalid
use patched Odin
Patched Odin 3.13.1
For those looking for a modified, modded, or patched odin that is a newer build than all the fake and renamed prince comsy 3.12.3 versions floating around. I patch recent Odin versions to offer similar functionality to the princecomsy; in that...
forum.xda-developers.com

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