I don't know what version BT is used in the JX, but obviously it is a problem, it seems if you have more that one BT device connected then problems develop, With both my 4S and now 5S, I have a Pebble Watch that connects to my phone via BT, with it turned on the BT doesn't work properly, I can't hear the person talking but they can hear me, they just tried this new update where they also put in another microphone in the vehicle, but now the voice quality is even worse, I don't know where they placed this new microphone but it must be outside because everyone I talk to including Infiniti Customer Relations, tell me to please roll up my windows because they cannot hear me due to the wind noise, and I tell them that my windows aren't down .
So I'm waiting for Customer Relations to get back to me because having an unusable hands free system in. $50,000 + car is unacceptable.
I just talked to Infiniti Customer Relations, Bluetooth Dept. and they stated iPhone software 6.1.4 is not working properly and that they are still testing the newer versions. I have an iPhone5 running 6.1.4 and I do not receive any text/alert tones while my phone is in my car (connected to bluetooth). I previously had an iPhone4 and did not have any issues except poor quality when streaming Pandora. Customer Relations said to bear with it for a couple more months until they've completed testing. ANNOYING!