A. 1. Ensure that Bluetooth is enabled on your iPhone and that the mask is charged. 2. Restart both the app and your iPhone. 3. Go to Settings > Bluetooth, and forget the mask device. Then, re-pair the mask by selecting it from the list of available devices. 4. If the issue persists, try resetting the mask by turning it off and on again.

B. 1. Check for any software updates for the Shining Mask app in the App Store and install them. 2. Move closer to the mask to ensure a strong Bluetooth connection. 3. If you have other Bluetooth devices connected, try disconnecting them to reduce interference.