Anyone have issues using both simultaneously? When I attempt to use Bluetooth with use sub plugged tells me Bluetooth unavailable and to unplug all devices

When an iPhone is plugged into USB1 with CarPlay enabled, there is no need for Bluetooth at all.

Without being given any other details, I can only confirm that USB1 is disabled when CarPlay is in use (iPhone plugged into USB1). That is because CarPlay uses the wired connection to make and receive calls (among all the other CarPlay features). It obviously needs to disable Bluetooth in order to do that.

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