Samsung s9 problem moving from lineage OS to /e/ OS

[alfredino]

Hi,
I recently installed lineage OS on samsung s9 starlte and it worked without any problem. Now I would like to upgrade to /e/ OS after the release of v2.0.
However, I may have broken my device as I manually deleted the system partition into recovery. Now I can only reboot in download mode, but heimdall 1.4.2 is unable to find my device (I have already tried different cables and USB ports and they are the same ones I used to install lineage OS).
I always get the error:

Initialising connection...
Detecting device...
ERROR: Failed to detect compatible download-mode device.

So I am unable to flash a new recovery and system. Do you have any suggestions? Is there anything I can do?
Thanks

[aibd]

When you look on the Odin mode screen, without the PC connected, do you see any unusual lock or something else showing?

If you have access to a Windows PC you could see if Odin sees the phone.

[piero]

@alfredino

I recently installed lineage OS

it could be a security patch level conflict because :

This /e/OS v2.0 version includes the Android security patches available until April 2024.

if formating /data don’t help, you have two options :

• wait for a more recent build that you can install from recovery
• starting from scratch by reinstalling Samsung firmware as a base

[HOWTO] an Unified Install Guide Project for /e/

this post is editable as a Wiki. (1) Download an /e/OS build (2) Download recovery-e or TWRP (3) install the appropriate Flashing Tools (4) allow “Non Vendor OS” to be installed on the device (5) Check the communication between the PC and your smartphone (6) Unlock the Bootloader (7) Flash a custom recovery manager on your device (8) install /e/ from your computer, using the “adb sideload” method or (9) Install /e/ without computer using the “Device-Storage” method (10) post install…

[alfredino]

Thank you for your reply.
After some trials, I managed to flash /e/OS v2.1 again
Now I have some final questions. I plan to use the device for “critical” scenarios like banking, e-commerce, important stuff, etc.
Do you recommend I use the stable version (android 12) or the community version (android 13)? Is it true that rooting increases the attack surface? And do you recommend not doing it?
Thanks