here is some information on how I resolved my bluetooth problems:
Just bought 2013 CX9. My salesman found that its USB does not connect to Android on Samsung Note 2.
At first I was not able to connect my Android 4.1.2 Bluetooth to my new CX9. I mean, it would pair and connect. Audio would pretend to play the songs I have on my Samsung Note 2, but no sound comes out. I solved it by upgrading to Jelly Bean 4.3 version of Android.
My phone on CX9 connects fine via Bluetooth to Samsung Note 2 running on 4.1.2 android and 4.3.
At first I was not able to connect my Android 4.1.2 Bluetooth to my new Mazda SUV CX9. I mean, it would pair and connect. Audio would pretend to play the songs I have on my Samsung Note 2, but no sound comes out. I solved it by upgrading to Jelly Bean 4.3 version of Android. However I had to boot my phone to "SAFE MODE" to get Mazda to automatically play songs from my Note2. If I do not run in SAFE MODE, I get the message "cannot playback bluetooth device while acquiring phone data". My Mazda dashboard would show that it is playing the songs I have on my Samsung Note 2, but no sound comes out from my Mazda stereo. My Note 2 will play music via earphone (not speakers) and there is no way to get my phone to play music via Note2 speaker again - I had to reboot my phone.
I stopped all my apps using "Advanced Task Killer". I may have to uninstall all my phone apps such as Talkatone, TextPlus, Skype, etc. Maybe one of these is trying to download data into my Mazda's contact list.
A second problem I am still struggling with when my phone rings, and I answer it, my audio connection to my Samung note 2 stops working. I would get error message:
cannot playback bluetooth device while acquiring phone data
I had to reconnect Bluetooth without phone option; I have to select only music option in my Bluetooth setup EVERYTIME I CONNECT. So this is frustrating. Anyone solved this problem?
ps. When not in SAFE MODE, ie. in normal MODE, My phone on CX9 connects fine via Bluetooth to Samsung Note 2 running on 4.1.2 android and 4.3.
cannot playback bluetooth while acquiring phone data
However, I am not able to get USB to work, nor am I am to get Pandora to work via Bluetooth.