my iphone connects and makes calls, but there is no audio. it seems to mute when paired with the n4. everything else works...calls in/out, etc.

there's no sound when a call is made to me or when i am calling someone but the call is being made. is there a setting i'm not missing for phone volume?

Did you plug the P-bus cable into the right hole on the bluetooth box?

yeah it's right

You sure? Try the other one

yeah it's all right. double checked