
Samsung GALAXY S III alpha
The latest firmware for Samsung GALAXY S III alpha (SC-03E) is SC03EOMUBOG5 with Android 4.3 (Jelly), released on July 27, 2015 for 1 region (CSC). Every official firmware build for SC-03E, 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/SC03EOMUBOG5
All 4 builds in our database run Android 4.3 (Jelly). The newest build, SC03EOMUBOG5, was released on July 27, 2015. No new build has appeared for 137 months, so regular updates for this model have most likely ended.

SC-02D

SC-02B

SC-01E

SC-01D

SC-01C
The newest firmware for SC-03E runs Android 4.3 (Jelly): build SC03EOMUBOG5, released on July 27, 2015.
The latest build for SC-03E, SC03EOMUBOG5, was released on July 27, 2015 (11 years ago).
SC-03E has had no new firmware for 137 months, so regular updates have most likely ended.
Yes, all firmware files for SC-03E are 100% official, original, and obtained directly from Samsung servers.
To flash SC-03E, 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-03E.