Networking issue
Networking issue
I strongly recommend reaching out to the service provider to explore an alternative cable, since the issue of connection failure when using the PC directly is highly concerning. It seems unusual that your Android device functions properly while the cable only connects through the router. If you don’t have another connected device available, consider using a low-cost USB Ethernet adapter and test the direct PC-to-router connection to verify functionality. This approach could help identify any intermittent problems with your PC’s Ethernet adapter.