I have been having intermittent issues with calls echoing back to those people I am talking to, both on and off speaker phone. I have tried several suggestions mentioned on other posts on internet searches, they seem to work when I make the change, but then it starts happening again. Also, the change doesn't always work for all callers. I made a change today, called one person with a Google Pixel phone and it was not echoing. I then received a call from someone with a Samsung Galaxy S21 and this person was receiving the echo. I have read many posts on the internet and it doesn't seem like there is a permanent solution to this issue. It is a very annoying issue for anyone that I call. I need some sort of permanent solution.