I was surprised to find out that the Siri voice assistant feature on my iPhone 4S works through the LR4 audio system through bluetooth. I can start Siri and then put the phone down on the seat, using the car microphone and speakers. Sending text messages handsfree is a great feature. I can also have the phone remind me to do a task when I arrive at a specific location. I am finding the new iPhone incredibly useful in the LR4.