This article will tell you what to do if you hear an echo during a phone call. It will also tell you what causes echoes.
Cell Phone Echo Problem: How to Fix Noise [iPhone]
Echoes sometimes occur when a conversation is being recorded. They occur when the sound emitted by the speakers is picked up by the microphone. They can also occur when your sound driver records all the sounds you hear. To determine which of the two is bothering you, perform a simple test: turn off your speakers or turn the volume down to zero. If the echo stops (your correspondent will be able to tell you if this is the case), your problem is with the recording process.
Echo caused by recording a call is difficult to fix without a hardware setup change. You can significantly reduce it by taking precautions, such as placing yourself as far away from your phone’s speaker as possible. Better yet, use earbuds or headsets instead of speakers. Choose headphones with echo cancellation and good shielding.
If you are experiencing echo issues with your sound driver, you should configure your sound driver to make your microphone the only input device for recording.
