A few months ago I had this problem too! I changed the deck thinking it was defective, and it did the same to the other one! I did figure it out, but for the life of me, I can't remember what it was! LOL Just dbl check all your connections, MIC input, etc. It was something simple and I overlooked it while installing it, but I can't remember exactly what it was! DOH! I'll post back if it comes back to me!

The jacks for the (Front) speakers are not hooked to the amplifier. Pull the radio out and check out the jacks that have the (FRONT) Tab on them. They might not be hooked up. had the same problem. phone calls come in and they can hear you but you cant hear them??