Settings → System → About device → Build number / Model.
typically requires a manual process using a USB drive, as these units rarely receive major OS upgrades via standard over-the-air (OTA) updates. Critical Pre-Update Check K2001n Firmware Update Android 11
Connect it to the unit's ; the system should auto-detect and prompt for the update. On-Device Update : Navigate to Settings > System > System Upgrade . Settings → System → About device → Build