Samsung Galaxy Core II Android smartphone. Announced Jun 2014. Features 4.5″ TFT display, 5 MP primary camera, 2000 mAh battery, 4 GB storage, 768 MB RAM. Upgrade to Nougat Here: Install Lineage OS 14.1 on Galaxy Core 2 Duos. As of now, this is an incremental update with latest Google Security patch for Samsung Galaxy Core 2 Duos.So make sure to update to keep your device safe with Google Security update which has patched a whole host of vulnerabilities in Android.