radio head unit bad or ??????????

[eomran]

finally, I was able to get my blue tooth to work, but I have the 7th generation mobule now, but here is my problem:

when I statrt the car and then dial a number no sound until I turn the radio on, but the radio does not mute so I hear both the phone and the radio, while talking over the phone if I turn power on and off the radio will mute and the phone still on.

If I turn on the radio first. then I dail a number the radio will mute but no sound output can ber heared fro the phone.

I ckecked all the connection are ok.

I am thinking it is the radio head unite unless someone has someother thoghts.