Joey has a basic phone connected to his Obihai and he's having issues hearing people on the other end. Leo says to try swapping out the phone to see if it eliminates the issue. If it persists, it could be the device itself. Another issue could be his upstream. If upload speed is really slow, there could be some severe latency that's dropping the packets in real-time. Also, put the Obihai to the internet connection first, and then add the router. That's how it should be installed.