This is the safest method. If your device supports it, the update will appear in the system settings menu.
This means the firmware is for a slightly different hardware revision. Double-check that your model matches the "H10NATV" suffix exactly. ums5121h10natv firmware new
Patches for Wi-Fi 5/6 drops and Bluetooth pairing lag. This is the safest method
Use a FAT32-formatted USB 3.0 drive.