I recently got an 8.4 UAQ unit to replace my stock 8.4 RA so I would have the benefit of carplay and android auto. Unfortunately, I don't have any sound on my end during calls unless I'm constantly tapping the screen (mute button). The company I bought it from sent me a replacement, but that one had the same issue in addition to a cracked screen. Given I didn't wait the "acclimation period" I don't know if that one genuinely had the same issue since it didn't have any sound during calls unless I did the same thing. They're sending me another replacement and I have to wait the 48 hour acclimation period to see if it works. The customer service person I spoke to today said the "tier 2" tech suggested the BCM might not be working with the UAQ. Does that make sense? I can stream music and videos without any issue, but any calls I make have no sound on my end. People on the other end hear me just fine. Anyone else out there done this upgrade and experienced this?