A german manual how to install an /e/ ROM

[archie]

@biggie

I really can’t remember. I think at least one of my two Galaxy S7 phones was updated to the latest supported oreo version. But I’m not sure about the second one. Both of them are 2nd hand bought until I installed /e/.

After manually checking for an update on the device, I get a message in StockROM Android 8.0.0:

Alter updating, you will not be able to downgrade to the old software because of updates to the security policy.

When trying to downgrade from a current Oreo 8.0.0 version 2019 to Nougat 7.0, I get the error message:

“SW REV.” CHECK FAIL (BOOTLOADER) DEVICE: 7, BINARY: 2

In my experience, Samsung’s download mode refuses due to Samsung’s internal firmware revision number downgrade from newer versions to older versions.

So how can I downgrade from StockROM Android Oreo 8.0.0 year 2019 to StockROM Android Nougat 7.0 year 2017/2018 to install /e/ OS e-0.7-n- dev (nougat)? What is the trick?