A. 1. Ensure that your Apple Watch is updated to the latest watchOS version. Go to the Watch app on your iPhone, tap General > Software Update.
2. Restart both your iPhone and Apple Watch to refresh the connection.
3. Check the Bluetooth settings on your iPhone to ensure that Bluetooth is enabled and that your Apple Watch is connected.
B. 4. If connectivity issues persist, try unpairing and then re-pairing your Apple Watch with your iPhone. Go to the Watch app, tap on your watch at the top, and select 'Unpair Apple Watch'. Then follow the prompts to re-pair.