So my wife has been getting a bad echo with her iPhone. I searched here and found a solution to get a new SIM card. So we did. Still an echo. My iPhone doesn't have the echo. I wanted to here it, so we switched phones and called each other. I didn't get an echo on her phone, but she got one on mine. Which leads us to the only possible solution of it being her voice. But is that possible? Anyone have this problem, or a solution to it?