Hello @wofr06, Welcome to the /e/ users forum.
You don’t need to touch Stock Firmware as the device was abandoned by Samsung with
android 9 in 2021
https://samfw.com/firmware/SM-G950F/
android 12 is abandoned by Gogol, and no more receive security updates since march 2025
.
Backup your things as you may be forced to format the /data partition if changing branch / builder…
android 12
e-3.0.4-s-20250711508337-community-dreamlte.zip
e-3.1.4-s-20250915526531-official-dreamlte.zip
android 13
e-3.1.4-t-20250917-UNOFFICIAL-dreamlte.zip
android 14
e-3.1.4-a14-20250917-UNOFFICIAL-dreamlte.zip