Is downgrade Pie => Nougat possible? - Android Q&A, Help & Troubleshooting

Hi, I would like to downgrade my Samsung XCover 4 (G390F) from Android 9 to 7. Is it possible? Simply flashing the stock Nougat using Odin fails because of different bootloader version.

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Backup bootloader only and flash samsung devices

I have a samsung P902 tablet which is specified version for P901 galaxy note pro 12.2". P902 version doesn't have stock rom or getting any update. Meanwhile P901 got android 5 recently. P901 and P902 has same hardware. So i need to update the bootloader to newest to use lollipop roms on my P902 device. Since there isn't a stock rom i need to keep myself safe. So is there a easy way to backup bootloader and make it flashable via odin or heimdall? Any information could help.

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Can I flash a firmware from a different region?

I want to know if I can flash a firmware on my phone using a firmware from a different region with a different Android version.
I want to upgrade the Android version of my phone from Android 7.0 Nougat to Android 8.1.0 Oreo or possibly Android 9 Pie, but the available firmware with the same PDA as my phone is only Android 7.0 Nougat.
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Need help regarding One UI 2.0 on A10

I have a Samsung Galaxy J7 with non-original screen and after updating it to android Pie it's touchscreen stopped working, after going through a complicated process i managed to downgrade it. I have another device; Samsung A10 with non original screen. As android 10 is already available on A10, i'm afraid to upgrade it because of my past experience. Anyone hear who is using fake/non-original screen and have upgraded to pie?
Kuchayhilal said:
I have a Samsung Galaxy J7 with non-original screen and after updating it to android Pie it's touchscreen stopped working, after going through a complicated process i managed to downgrade it. I have another device; Samsung A10 with non original screen. As android 10 is already available on A10, i'm afraid to upgrade it because of my past experience. Anyone hear who is using fake/non-original screen and have upgraded to pie?
Click to expand...
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You can upgrade it to Android 10.
In case, your touchscreen doesn't work, you can downgrade to android 9 on A10 via odin mode.
Chatur27 said:
You can upgrade it to Android 10.
In case, your touchscreen doesn't work, you can downgrade to android 9 on A10 via odin mode.
Click to expand...
Click to collapse
Does downgrade process work on A10?
Kuchayhilal said:
Does downgrade process work on A10?
Click to expand...
Click to collapse
For A10, android 10 and android 9 use the same binary version, which is version 3.
Therefore, you can downgrade to the latest release of android 9.
The binary version can be obtained from the bootloader's filename found in stock firmware.
The bootloader's filename general format is as follows: BL_A105XXXU3XXXX
U3 is the binary version.
You can compare before you try to flash

Can TWRP Flash Firmware of Samsung Galaxy A7 2017?

I'm not able to use odin because it fails.
It was from Android 8 stock and now using Custom Rom Lineage which is not working well. My Android ver now is 11. I know I cannot downgrade using ODIN and it doesn't work.
Any suggestions?

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