First action: back up everything and confirm the exact model code in Settings > About phone (look for the SM-xxxx identifier and the region/CSC). Create a full data archive (local copy + cloud sync for contacts, photos and app backups), ensure Wi‑Fi is connected and battery is above 50%, then proceed to fetch and install the newer system build via the phone’s built-in update mechanism. What the handset shipped with and what to expect: the device left factory with Google’s mobile platform 9 (Pie...