
Samsung Galaxy S 4 (Korea)
The latest firmware for Samsung Galaxy S 4 (Korea) (SHV-E300S) is E300SKSUGPI1 with Android 5.0.1 (KitKat), released on September 18, 2016 for 1 region (CSC). Every official firmware build for SHV-E300S, newest first: one row per build with all regions (CSC) that received it.
SHV-E300S started on Android 4 and has received 1 major Android upgrade; it now runs Android 5.0.1 (KitKat). The newest build, E300SKSUGPI1, was released on September 18, 2016. No new build has appeared for 122 months, so regular updates for this model have most likely ended.
The newest firmware for SHV-E300S runs Android 5.0.1 (KitKat): build E300SKSUGPI1, released on September 18, 2016.
The latest build for SHV-E300S, E300SKSUGPI1, was released on September 18, 2016 (10 years ago).
SHV-E300S has had no new firmware for 122 months, so regular updates have most likely ended.
Yes, all firmware files for SHV-E300S are 100% official, original, and obtained directly from Samsung servers.
To flash SHV-E300S, 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 SHV-E300S.