
Samsung Galaxy Core LTE
The latest firmware for Samsung Galaxy Core LTE (SM-G386F) is G386FXWUAOL1 with Jelly(Android Bean), released on December 19, 2015 for 3 regions (CSC). Every official firmware build for SM-G386F, 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/G386FXWUAOL1
All 27 builds in our database run Android 4.2.2 (Jelly). The newest build, G386FXWUAOL1, was released on December 19, 2015. No new build has appeared for 132 months, so regular updates for this model have most likely ended.
Box codes of SM-G386F for different colors and markets. Firmware is chosen by the model code SM-G386F and your region (CSC), not by the SKU.

SM-G935TZK

SM-G930AZK

SM-G935AZS

SM-G935TZS

SM-G935AZK

SM-G935TZD

SM-G975WC

SM-G975FC
The newest firmware for SM-G386F runs Android 4.2.2 (Jelly): build G386FXWUAOL1, released on December 19, 2015.
The latest build for SM-G386F, G386FXWUAOL1, was released on December 19, 2015 (10 years ago).
SM-G386F has had no new firmware for 132 months, so regular updates have most likely ended.
Yes, all firmware files for SM-G386F are 100% official, original, and obtained directly from Samsung servers.
To flash SM-G386F, 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-G386F.