
Samsung Galaxy A25 5G
Every official firmware build for SM-S256V, newest first: one row per build with all regions (CSC) that received it.

SM-S266V

SM-S156V

SM-S236D

SM-S366V

SM-S367VL
You can find the firmware on the model: SM-S256V page.
Yes, all firmware files for SM-S256V are 100% official, original, and obtained directly from Samsung servers.
To flash SM-S256V, 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 SM-S256V.