
Samsung Galaxy J1 Mini Prime
The latest firmware for Samsung Galaxy J1 Mini Prime (SM-J106M) is J106MUBU0ARL2 with Android 6.0.1, released on December 12, 2018 for 11 regions (CSC). Every official firmware build for SM-J106M, 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/J106MUBU0ARL2
All 22 builds in our database run Android 6.0.1. The newest build, J106MUBU0ARL2, was released on December 12, 2018. No new build has appeared for 95 months, so regular updates for this model have most likely ended.
Specifications of SM-J106, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-J106H

SM-J100VPP

SM-J105Y

SM-J200GU

SM-J110M
The newest firmware for SM-J106M runs Android 6.0.1: build J106MUBU0ARL2, released on December 12, 2018.
The latest build for SM-J106M, J106MUBU0ARL2, was released on December 12, 2018 (7 years ago).
SM-J106M has had no new firmware for 95 months, so regular updates have most likely ended.
Yes, all firmware files for SM-J106M are 100% official, original, and obtained directly from Samsung servers.
To flash SM-J106M, 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-J106M.