j200mGalaxy J2 (SM-J200MDS) Galaxy J2 Core (SM-J260M) System version: Android 5.1.1 Lollipop: Android 8.1 Oreo: Firmware update: feature not registered: featureHow to flash Samsung SM-J200M Galaxy J2 SM-J200M firmware 1. Extract (unzip) the Samsung firmware file. Recommended using WinRAR or 7-Zip. 2. Download Odin Tool 3.13.1.