A. 1. Ensure that no other Bluetooth devices are interfering with the connection. Disconnect other devices temporarily to see if the issue resolves. 2. Forget the LED lamp in your Bluetooth settings (Settings > Bluetooth > [Your LED Lamp] > Forget This Device) and then reconnect it.

B. 1. Check if your iPhone's software is up to date (Settings > General > Software Update). An outdated iOS can cause connectivity issues. 2. Try resetting your network settings (Settings > General > Reset > Reset Network Settings). This will reset Wi-Fi networks and passwords, cellular settings, and VPN/APN settings.