Look for "Build Number," "MCU Version," or "System Version" in your settings. This often contains a brand code or date that helps identify the right firmware.
If an update is available, the device will handle the download and installation automatically. Safety Precautions Before Updating ums5121h10natv firmware update link
https://mega.nz/file/xxxxxxxx#ums5121h10natv_android12_20240315.pac Look for "Build Number," "MCU Version," or "System
If you only want an incremental OTA (over-the-air) update without wiping data: Look for "Build Number