To resolve issues with the NPV Tunnel on your Huawei Y70 Plus, follow these detailed steps:

Check VPN Configuration

1. Verify VPN Settings:
- Go to Settings on your device.
- Scroll down to Connections and select VPN.
- Ensure that the configuration settings for the NPV Tunnel are correct (server address, authentication methods, etc.).

2. Reconnect the VPN:
- If the settings are correct, try disconnecting and reconnecting the NPV Tunnel from the VPN menu.

Update Device Software

3. Check for Updates:
- Open Settings and go to System & Updates.
- Tap on Software update to check for any available updates. Install them if available.

Network Settings

4. Reset Network Settings:
- If reconnecting does not work, reset the network settings:
- Go to Settings, tap on System, then select Reset.
- Choose Reset network settings. Confirm the reset and try connecting to the VPN again afterward.

Firewall and Permissions

5. Check App Permissions:
- Ensure that the NPV Tunnel app has the necessary permissions to operate:
- Go to Settings, then select Apps.
- Find the NPV Tunnel app and check permissions like device access and data sharing.

6. Firewall Settings:
- Check if there is a built-in firewall or security app interfering with the VPN connection. Disable it temporarily to see if the VPN can connect.

Contact Support

7. Consult Huawei Support:
- If you still encounter issues, consider reaching out to Huawei support for additional troubleshooting steps specific to the Y70 Plus model. You can refer to troubleshooting documents for IPSec VPN issues here - [learn more].

Following these steps should help in resolving the connectivity problem with the NPV Tunnel on your Huawei Y70 Plus.