Pioneer AVIC Bluetooth Echo

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I have had this echo since I first installed the unit months ago. I read on the AVIC411 site there are two possible resolutions to remove the echo. One is to install a software update, that will disable my Z1 flasher bypass, and I would have to revert to the newer bypass of adding a wire and grounding the wire. The other is to make sure, when pairing the phone to the unit, the phone earbud volume is set as low as it will go.
So, I tried the second option first. First, I removed the AVIC from my phone as a paired device, then went outside and did a Method 3 reset on the AVIC. This did away with some settings, and some other minor settings such as regional, and canceled the bluetooth connection to my phone's ID. It did not erase anything on the harddrive or the phone book.
I made sure my phone listening volume (not the ring volume, but the earbud volume is what it is called on my LG) was as low as it would go, then re-paired the phone to the AVIC.
I left the other settings the same; right speaker only, set to 5 or 6 for volume, and left the mic on the sun visor.
I then called three people, and no one heard an echo. In fact, the third person I called, has never allowed me to talk to him with the bluetooth, since the echo drove him crazier than he already is. However, today, he heard NO echo.
After you have paired the two devices together, you can then adjust your earbud volume up as high as you want to, and it does not affect the echo. When I made the three test calls, I had already turned the volume up to max.
So, if anyone has this echo, it appears this solution it works. At least for me it has worked, some on the AVIC411 forum stated it worked for them, some said it didn't.

The CD software update, form what people are saying, does allow you to turn the volume up a bit higher, but 6 is high enough for me, even at freeway speeds. I didn't feel like tearing the unit apart to do the new bypass; I'll wait till next spring when Pioneer is supposed to release a complete new software update for the Z1.