Any HFT experts out there? I can receive calls ok but if I press the mic button to give any voice commands to make a call, I hear three rapid beeps & it fails to respond. The mic does work for other functions & it checks out ok in diagnostics. I have never used the HFT much but it did work when I initially set it up. I think it may have stopped working recently since I had the battery disconnected but can't be sure. Any advice would be appreciated. Thanks.