
Samsung Galaxy Grand Prime
The latest firmware for Samsung Galaxy Grand Prime (SM-G530BT) is G530BTVJS1BRL1 with Android 4.4.4 (KitKat), released on December 18, 2018 for 1 region (CSC). Every official firmware build for SM-G530BT, 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/G530BTVJS1BRL1
All 10 builds in our database run Android 4.4.4 (KitKat). The newest build, G530BTVJS1BRL1, was released on December 18, 2018. No new build has appeared for 95 months, so regular updates for this model have most likely ended.
Specifications of SM-G530, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-G530AZ

SM-G532MT

SM-G525N

SM-G6200

SM-G730V
The newest firmware for SM-G530BT runs Android 4.4.4 (KitKat): build G530BTVJS1BRL1, released on December 18, 2018.
The latest build for SM-G530BT, G530BTVJS1BRL1, was released on December 18, 2018 (7 years ago).
SM-G530BT has had no new firmware for 95 months, so regular updates have most likely ended.
Yes, all firmware files for SM-G530BT are 100% official, original, and obtained directly from Samsung servers.
To flash SM-G530BT, 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-G530BT.