When I first started using handsfree with my z140BH a few months ago the music audio would fade out whenever I sourced or received a call. This worked with my iPhone 4S and later with my iPhone 5. It didn't matter if the source was XM, Tuner, iPOD functions, etc., the music audio always became muted when a cellphone call was received or sourced.
When I updated my iPhone 5 to iOS 6.0.2 (I think, it was one of those 6.0.x updates prior to 6.1) I could no longer connect my iPhone 5 to my z140BH via Bluetooth. Needless to say nothing involving the phone operation worked. Since Pioneer doesn