Hello! Thanks for your reply.
I can’t say with 100% certainty that it was working before, as this is a used phone I have bought (specifically for the purpose of installing /e/ ). However, everything else is working perfectly, and the phone is supposed to have been tested as it is sold with a warantee. I have not verified it myself. Maybe is there a software way to check that?
The phone came with Android 10. I imagine that the seller flashed one of the latest stock ROM.
The installation of /e/ was pretty difficult, and I have tried flashing it a first time, had then to update the vendor (27_ARI9), could not flash it anymore… instead tried LineageOS, then tried to reflash a stock ROM which failed… then back to TWRP, and finally /e/ installation worked.
This was pretty much all my fault as I had to learn basically from scratch the android world, what the download and recovery modes were, how to use Odin and TWRP…
Anyway, /e/ is working fine now, with the exception of the fingerprint scanner. I don’t know if it could be related to a wrong step I took somewhere.
If it helps I now have Android 8.1.0, baseband G965FXXSBETH2, kernel 4.9.133+.