To resolve the "No connection to server" issue with TeleGuard on both your PC and iPhone, you can follow these steps:

1. Check Network Connection
- Ensure that both your PC and iPhone are connected to the internet. You can try visiting a website on your browser to confirm connectivity.

2. Restart Devices
- Restart both your PC and iPhone. This can clear temporary issues with the applications and network settings.

3. Update TeleGuard
- Make sure you are running the latest version of the TeleGuard app on both devices. On your PC, check for updates through the application or the official site. For your iPhone, visit the App Store, go to your account, and check for updates under purchased apps.

4. Check App Permissions
- Ensure that TeleGuard has the necessary permissions to use the network on both devices:
- On iPhone, go to Settings > TeleGuard, and make sure all necessary permissions are granted.
- On PC, check your firewall or antivirus settings to ensure TeleGuard is allowed through.

5. Firewall/Antivirus Configuration
- Check if your firewall or antivirus program is blocking TeleGuard from connecting to servers. You may need to whitelist TeleGuard in your security software.

6. Use a Different Network
- Try connecting to a different internet network to rule out issues with your current connection. For example, you can switch from a Wi-Fi network to mobile data on your iPhone or use a different Wi-Fi network on your PC.

7. Server Status Check
- Visit forums or communities to check if there are any ongoing server outages or issues. You can look at the current status reports related to TeleGuard to confirm if others are experiencing similar problems - learn more - learn more.

8. Reinstall the App
- If the problem persists, consider uninstalling and then reinstalling the TeleGuard app on both your PC and iPhone. This can help fix any underlying issues with the software installation.

9. Contact Support
- If none of the above steps work, reach out to TeleGuard support for further assistance. They may provide specific troubleshoot steps or acknowledge any server-related issues on their end.

Following these steps should help you to resynchronize and regain access to the TeleGuard server.