think it depends on which module. I have an 9W3 module and an iphone4. I can search through contacts and dial on the RNS, as well as answer calls. I can see who is calling n the display. mine does not support Bluetooth streaming, but when plugged into the MDI slot, I have full control of the iphone along with steering wheel control. it does charge too.
I assume the later modules would have Bluetooth streaming