| Check Item | Method | Expected Result | | :--- | :--- | :--- | | | Observe LEDs | Power and Internet LEDs solid (not blinking fast). | | Firmware Version | Settings > About | Matches newly installed version. | | LTE Connectivity | Network > Mobile Data | Shows signal strength, operator name, APN active. | | Wi-Fi Operation | Scan for SSID | Both 2.4 GHz and 5 GHz networks visible. | | Factory Reset (Recommended) | Hold reset button 10s | Clears residual old configs; reconfigure manually. |