
Samsung Galaxy Grand Prime
The latest firmware for Samsung Galaxy Grand Prime (SM-G531H) is G531HUBS0ARJ3 with Android 5.1.1 (Lollipop), released on October 7, 2018 for 1 region (CSC). Every official firmware build for SM-G531H, 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/G531HUBS0ARJ3
All 82 builds in our database run Android 5.1.1 (Lollipop). The newest build, G531HUBS0ARJ3, was released on October 7, 2018. No new build has appeared for 98 months, so regular updates for this model have most likely ended.
Box codes of SM-G531H for different colors and markets. Firmware is chosen by the model code SM-G531H and your region (CSC), not by the SKU.

SM-G531Y

SM-G530A

SM-G532MT

SM-G525N

SM-G6200
The newest firmware for SM-G531H runs Android 5.1.1 (Lollipop): build G531HUBS0ARJ3, released on October 7, 2018.
The latest build for SM-G531H, G531HUBS0ARJ3, was released on October 7, 2018 (8 years ago).
SM-G531H has had no new firmware for 98 months, so regular updates have most likely ended.
Yes, all firmware files for SM-G531H are 100% official, original, and obtained directly from Samsung servers.
To flash SM-G531H, 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-G531H.