Download free last firmware for SM-J250N SM-J250N with product code KOO from N/a. This firmware has version number PDA J250NKOU1ARL1 and CSC J250NKOO1ARL1 The operating system of this firmware is Android 7.1.1 Nougat , with build date 19.12.2018.Security patch date is 01.12.2018, with changelist 15035553.