What about navigation, does it work over Bluetooth?
My problem is storage on the phone. Just 32g.
If I knew I'd be using it for music I would have bought one with more memory.
To answer your questions about AA and mib2, you can have them both running at the same time. It is great and seamless. You can have turn by turn Google maps navigation from AA while listening to SD media music, while having a different screen displayed (like the performance monitor). If your phone is Bluetooth only, the call is answered and taken care of using the mib interface. If you use a USB cable, the call is still Bluetooth, but uses the AA interface. You can play music or nav via Bluetooth but you have to have media selected as Bluetooth. I dislike this because BT music quality is worse, and you can't use another media source. On short trips, I let my phone speaker do the nav, so I can listen to the radio or have other media options. Now if you use AA, the nav can come through the car speakers while listening to any media source.