If your Galaxy S23 Ultra won’t connect via Ethernet using DHCP or manual IP, try these steps:
1. Use a compatible USB-C to Ethernet adapter — not all adapters work with Android. Make sure it’s powered if required.
2. Check your router — ensure DHCP is enabled, and test the Ethernet cable/port with another device.
3. For manual setup, use correct IP, gateway (e.g. 192.168.1.1), subnet (255.255.255.0), and DNS (e.g. 8.8.8.8).
4. Go to Settings > Connections > More connection settings > Ethernet to check status.
5. Try toggling Airplane Mode, or boot into Safe Mode to rule out app conflicts.
6. Ensure your phone software is up to date.
If it still doesn't work, try a different adapter. I hope this worked for you.