Echoing on phone

Hola,

I was hoping to revive this thread since it seems my situation seems a little more unique. To start, I always use wifi calling since the coverage is terrible at my house so all incoming and outgoing calls are on our high speed internet connection. When I use my 2yr old Samsung Galaxy to call someone there's no problem. If someone calls me (no speakerphone, no headsets), there is an echo. The only way it's solved is by me calling them back. My wife's 3yr old Apple does not have this issue. I've tried rebooting and checking to see if I have the most recent updates on the phone, to no avail. And my ethernet connections seem okay.

Is it time for a new phone? Or is this fixable?

Thank you all for your help!