
Samsung Galaxy K Zoom
The latest firmware for Samsung Galaxy K Zoom (SM-C111M) is C111MUBU1AOI1 with Android 4.4.2 (KitKat), released on September 27, 2015 for 5 regions (CSC). Every official firmware build for SM-C111M, 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/C111MUBU1AOI1
All 6 builds in our database run Android 4.4.2 (KitKat). The newest build, C111MUBU1AOI1, was released on September 27, 2015. No new build has appeared for 134 months, so regular updates for this model have most likely ended.
Specifications of SM-C111, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-C1116

SM-C115W

SM-C105S

SM-C500X

SM-C5018
The newest firmware for SM-C111M runs Android 4.4.2 (KitKat): build C111MUBU1AOI1, released on September 27, 2015.
The latest build for SM-C111M, C111MUBU1AOI1, was released on September 27, 2015 (11 years ago).
SM-C111M has had no new firmware for 134 months, so regular updates have most likely ended.
Yes, all firmware files for SM-C111M are 100% official, original, and obtained directly from Samsung servers.
To flash SM-C111M, 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-C111M.