
Samsung Galaxy S9+
The latest firmware for Samsung Galaxy S9+ (SC-03K) is SC03KOMU1CUF3 with Android 10, released on June 22, 2021 for 1 region (CSC). Every official firmware build for SC-03K, newest first: one row per build with all regions (CSC) that received it.
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/SC03KOMU1CUF3
SC-03K started on Android 8 and has received 2 major Android upgrades; it now runs Android 10. The newest build, SC03KOMU1CUF3, was released on June 22, 2021. No new build has appeared for 65 months, so regular updates for this model have most likely ended.
· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

SC-02D

SC-02B

SC-01E

SC-01D

SC-01C
The newest firmware for SC-03K runs Android 10: build SC03KOMU1CUF3, released on June 22, 2021.
The latest build for SC-03K, SC03KOMU1CUF3, was released on June 22, 2021 (5 years ago).
SC-03K has had no new firmware for 65 months, so regular updates have most likely ended.
Yes, all firmware files for SC-03K are 100% official, original, and obtained directly from Samsung servers.
To flash SC-03K, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SC-03K.