Galaxy On7 SM-G610K with product code KTC from Korea (KT Corporation). This firmware has version number PDA G610KKKU2CSB1 and CSC G610KKTC2CSB1. The operating system of this firmware is Android 8.1.0 , with build date Thu, 21 Feb 2019 07:47:17 +0000. Security patch date is 2019-02-01.