Hi there! I understand your RDFit app’s Siri and call features say "not connected" even though Bluetooth is on and connected. Let’s get this sorted together.

First, just to clarify a bit more:
- Is the RDFit smartwatch physically connected to your iPhone via Bluetooth, or is it just showing paired?
- Have you tried using Siri normally outside the RDFit app—does Siri work on your iPhone in other apps or scenarios?
- Are the RDFit app and your watch’s firmware both updated to the latest versions?

Meanwhile, here’s a step-by-step approach to troubleshoot your issue with Siri and calling on iOS 18.7:

1. Confirm Bluetooth Connection:
- Go to iPhone Settings > Bluetooth and make sure your RDFit watch appears as connected, not just paired. If not, tap it to reconnect.

2. Restart Devices:
- Restart your iPhone and your RDFit watch. This often resolves temporary connection glitches.

3. Re-pair the Device:
- In Bluetooth settings, tap the "i" next to your watch, then choose "Forget This Device."
- Turn off Bluetooth, then turn it back on and pair your watch again through the RDFit app.

4. Ensure Permissions are Allowed:
- Open your iPhone Settings > Privacy > Microphone, ensure the RDFit app has permission to access the microphone for voice commands.
- Likewise, check Settings > RDFit app and enable access to Siri & Search.

5. Activate Siri on the RDFit Watch:
- Sometimes you need to enable Siri interaction specifically on the watch through the RDFit app. Open RDFit, go to device settings, and look for Siri or voice control options and enable them.

6. Check Call/Siri Settings in RDFit App:
- Inside the RDFit app, ensure that the voice call or Siri features are enabled and that the watch’s Bluetooth version (3.0/5.0) is compatible for voice features. Sometimes, older Bluetooth versions may limit functionality.

7. Test Siri Outside RDFit:
- Just to isolate the issue, try invoking Siri on your iPhone via the side button or “Hey Siri” command when not connected to the watch. If that works, the problem is likely between the watch and app.

If after all that it still says 'not connected,' there might be a deeper sync issue or possibly a compatibility or firmware matter. I can help you locate and run firmware updates if you need.

Does that sound like a plan? Also, please share any specific error messages or unusual behavior you see, that will help me pinpoint the issue better.

Are you satisfied with this approach so far?