Bluetooth disconnects when usb cable is connected, to use Apple CarPlay
I just got a response from the seller, and seems it’s a problem with the K10 models, so they offered me a return with full refund.
Mine does this too. When I connect iPhone to USB, Bluetooth goes down and Connectivity button changes to carplay. I have to push the CarPlay button to launch the interface. I prefer CarPlay to Bluetooth so this isn’t an issue to me.