Flash at your own risk, as always.
Make sure you're always on the latest BL + CP!
SM-G96X | Galaxy S9/S9+
FirmwareTWRP-flashable Firmware Updates
Just flash the downloaded zip in TWRP Recovery.
SM-G96XF/FD | Galaxy S9/S9+ [Android 9.0 | PIE]
ModsActivates back the Dual Sim + SD Card option
You want to keep up to date? Here you can check what I have changed.