Hi there! I see you're having a "no connection" issue with the DMSS app on your iPhone running iOS 18.7. I'd love to help you get this sorted out. To better assist you, could you tell me:

- Are you trying to connect over Wi-Fi or cellular data?
- Is this happening all the time or just when you're away from your home network?
- Have you recently updated the DMSS app or your iPhone OS?
- Have you tried any troubleshooting steps already?

Once I have a bit more info, I can guide you through specific steps. Meanwhile, here’s a general approach that often resolves connection problems with DMSS:

1. Check Your Phone's Internet Connection
Make sure your iPhone has a stable internet connection, either Wi-Fi or cellular.

2. Verify the Dahua Device is Online
Check if the device (camera or recorder) you’re trying to view is powered on and connected to the internet.

3. Confirm Login Credentials in the App
Sometimes login info can get invalid. Try re-entering your username and password in the app settings.

4. Re-add the Device in DMSS
Remove the device from your DMSS app and add it again, ensuring the correct device ID or IP address is used.

5. Check for Permissions
On iOS 18.7, make sure the DMSS app has permissions for network access and local network usage under your device settings.

6. Restart Devices
Restart your iPhone and the Dahua device by unplugging it for about 10 seconds and plugging it back in.

If none of these steps solve the problem, I can help you check deeper network settings or app logs. Let me know what you've tried or noticed so far!

More detailed guide here

Are you satisfied with the solution I provided so far?