I spent about an hour on the phone with Verizon today about this issue. I got the TB about a week ago and replaced the phone with a new one yesterday because of this speakerphone issue.
However, my replacement TB is doing the same exact thing. I put 3 different techs on speakerphone today when I was on the phone with VZW and they all agreed it was horrible. The tech confirmed that his supervisor's TB at VZW was doing the same thing, but other TBs on their shelf were NOT doing it. So there are some phones with that problem, and some without.
But I discovered it only does this when the speakerphone volume is between 0% and 50%. When I turn the volume up on my end, the echo on their end goes away. However, they are really freakin loud on my end, which is why I normally have calls turned down below 50%. With my two phones I have tried, and with their phone at VZW, the LOWER the speakerphone volume on my phone, the WORSE the echo. If I turn the speakerphone volume on up my TB, the echo on the other party's phone goes away. So VZW has now confirmed this issue.
But I am anxious to hear if some other TB users can test this by turning their speaker volume down to see if an echo appears.
Should I try my luck with a third TB??? Suggestions??
Brian