I have read about the echo sound when installing the bt feature. I was under the impression it was on our end. When using, the person I am talking to sounds fine but on their end they hear the echos. Is this normal or do I need the updated cd?

If you have a Z1, do the bluetooth update

What if you have the Z2? My friends tell me they hear a echo when they talk to me on my bluetooth. How do I fix it?

Try different mic placements and adjusting which speakers the voice comes out of

i just had to turn the volume down a little. Now all is fine