Everything works as it should, until I start playing music from my iphone, or plug my iphone in. Then, everything works, except the volume control buttons. It's the strangest thing. If I start my car with the iphone plugged in, it usually holds up fine.

I haven't had any issues with mine. I'm using the 3gs phone.

To update my problem: I received a call today through the bluetooth, and the music volume dropped as it should. But, after I hung up, I wasn't able to adjust the volume at all. This also happens, when I do a search for music. I'm getting sick of this unit.

It could be a defective BT module...

It could be a defective BT module...

I'm thinking it could be that, or my iPhone Bluetooth. I noticed that my phone no longer has lock sounds, or game sounds when I disconnect from the z3. Something is up with te Bluetooth.