
Samsung Galaxy S 3 LTE (Korea LG+)
The latest firmware for Samsung Galaxy S 3 LTE (Korea LG+) (SHV-E210L) is E210LKLUKPJ2 with Android 4.4.4 (Jelly), released on October 20, 2016 for 1 region (CSC). Every official firmware build for SHV-E210L, 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/E210LKLUKPJ2
All 7 builds in our database run Android 4.4.4 (Jelly). The newest build, E210LKLUKPJ2, was released on October 20, 2016. No new build has appeared for 121 months, so regular updates for this model have most likely ended.

SHV-E500L

SHV-E400K

SHV-E370K

SHV-E330L

SHV-E310L
The newest firmware for SHV-E210L runs Android 4.4.4 (Jelly): build E210LKLUKPJ2, released on October 20, 2016.
The latest build for SHV-E210L, E210LKLUKPJ2, was released on October 20, 2016 (10 years ago).
SHV-E210L has had no new firmware for 121 months, so regular updates have most likely ended.
Yes, all firmware files for SHV-E210L are 100% official, original, and obtained directly from Samsung servers.
To flash SHV-E210L, 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-E210L.