Hope somebody can help. I used to be able to plug my iPhone 4 into my car stereo using its USB connection, but now the car stereo just has READ flashing on it. It does not start to play my music, I use USB Rather than Aux because It also charges my iPhone (I also use my phone as a satnav) another thing that happens it when I unplug the e phone from the car stereo is that it stops any external sound until I go to sound settings and tap on any sound , the external sounds then work. I could use Bluetooth to play my iPhone songs but I cannot scroll through my albums on the stereo that way. Any help appreciated.