I am having the same echo problem with my Verizon 7130. They have replaced the handset three times and the problem persists. Technical support told me to dial *** after each problem call, and they would get back to me. It has been several days, and I have not heard back from them and I am not optimistic that they will solve or acknowledge the problem.
The problem makes the 7130 useless for telephone calls. I have re-activated my old 7250 - works perfectly.
I am going to push Verizon to take the unit back.