I may have solved my Bluetooth woes; ECU update?
 

And maybe someone else can benefit. Since I purchased my 2007 RDX Tech a few months ago it hasn't reliably held a BT connection to my phone. Then I discovered that if I sat idling for a minute after starting and watched the BT connection on my phone (a htc One M8), it would connect then disconnect up to three times, but then seem to hold the connection. I haven't had a chance to see if it lasts for long periods of time yet, like on a long drive.