
Samsung Galaxy J5(2016)
The latest firmware for Samsung Galaxy J5(2016) (SM-J510L) is J510LKLS1BTJ1 with Android 6.0.1 (Marshmallow), released on November 2, 2020 for 1 region (CSC). Every official firmware build for SM-J510L, 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/J510LKLS1BTJ1
All 11 builds in our database run Android 6.0.1 (Marshmallow). The newest build, J510LKLS1BTJ1, was released on November 2, 2020. No new build has appeared for 72 months, so regular updates for this model have most likely ended.
Box codes of SM-J510L for different colors and markets. Firmware is chosen by the model code SM-J510L and your region (CSC), not by the SKU.

SM-J510UN

SM-J500Y

SM-J610G

SM-J415N

SM-J410G
The newest firmware for SM-J510L runs Android 6.0.1 (Marshmallow): build J510LKLS1BTJ1, released on November 2, 2020.
The latest build for SM-J510L, J510LKLS1BTJ1, was released on November 2, 2020 (5 years ago).
SM-J510L has had no new firmware for 72 months, so regular updates have most likely ended.
Yes, all firmware files for SM-J510L are 100% official, original, and obtained directly from Samsung servers.
To flash SM-J510L, 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-J510L.