I have had my RX 450H+Tacumi now for 3 weeks and am just about up with all the new electronics. The iPhone connectivity was a very attractive one and I read up on all the different functions. However, 1 function is not well known. I had locked the car with the Key and was sitting in a cafe across the road. My daughter wanted to get something from the car so I used my iPhone to unlock it. I didn't work. So I tried many time when I got home and it still didn't work. I then noticed if I locked it with the phone and not the key, it did work. A call to the garage confirmed that was the case. I still have lots of issues with the iPhone interface which I am told needs a visit to the Garage ti fix.