Download the Samsung firmware for the Galaxy S6 SM-G920K with product
code KTC from Korea (KT Corporation). This firmware
version number PDA G920KKKU3EQC6 and CSC
The operating system of this firmware
is Android 7.0 , with build date Tue, 14 Mar 2017 02:01:10 +0000.
Security patch date is 2017-03-01, with