Now when plugged into my car radio i can control my songs with both the iphone and the head unit at the same time. On previous iOS versions i had to either be in ipod mode (can only control from the iPhone ) or hands free mode (control using the buttons on the head unit and on the iphone it would say iphone being used by an accessory so i couldnt change songs from there). Now i can keep it on hands free mode and use either the iphone or the head unit to control the songs.