Samsung Galaxy S4 Zoom LTE (Korea/SK-Telecom) (SM-C105S) Firmware Overview
The archive lists 2 official builds for the Samsung Galaxy S4 Zoom LTE (Korea/SK-Telecom) across 1 region (CSC). The newest one is C105SKSUANC2, released April 9, 2014 with Android Bean. It is a security update on bootloader binary 30: once a phone runs it, firmware with a lower binary can no longer be flashed (how to read a build number).
How to Flash SM-C105S Firmware
Put the Samsung Galaxy S4 Zoom LTE (Korea/SK-Telecom) into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with the same or a higher Bit than the one installed — a lower bootloader binary will be rejected.