
Samsung Galaxy S4 mini
The latest firmware for Samsung Galaxy S4 mini (GT-I9192) is I9192UBUCOI2 with Android 4.4.2 (KitKat), released on September 22, 2015 for 7 regions (CSC). Every official firmware build for GT-I9192, 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/I9192UBUCOI2
All 31 builds in our database run Android 4.4.2 (KitKat). The newest build, I9192UBUCOI2, was released on September 22, 2015. No new build has appeared for 135 months, so regular updates for this model have most likely ended.

GT-I9308

GT-I9268

GT-I9228

GT-I9210

GT-I9108

GT-I9103

GT-I9100T

GT-I9050
The newest firmware for GT-I9192 runs Android 4.4.2 (KitKat): build I9192UBUCOI2, released on September 22, 2015.
The latest build for GT-I9192, I9192UBUCOI2, was released on September 22, 2015 (11 years ago).
GT-I9192 has had no new firmware for 135 months, so regular updates have most likely ended.
Yes, all firmware files for GT-I9192 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-I9192, 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 GT-I9192.