iPhone 4S Users Complaining of Audio Issues: No Audio on Outgoing Calls, Echoes, Static

A number of complaints regarding problems with echo on the iPhone 4S when used with a headset, with calls is growing. Moreover, the problem seems to appear on different phone models and carriers.

When using the Apple hands free headset with the phone during a call, I get an echo problem. It does not occur immediately. It can very from 30 seconds into a call and as far up to 9 mins in before it begins the annoying echo. If I unplug the headset it goes away but will return when I plug the headset back in. I have tried 3 brand new iphone 4s headsets with the same problems. So far I have tried rebooting, and also restored phone back to factory original settings as a new phone and still no resolution. I have been told by the other person on the line a screech sound is made then the echo begins.

Other issue that affects both incoming and outgoing calls is static on iPhone 4S call. The issue also occurs on multiple handsets as users exchanged devices at Apple retail stores in attempts to address the problem

The third problem involves users experiencing no audio on a subset of outgoing phone calls.

Picked up a Verizon iPhone 4S - 32GB and on about 1 in 10 calls I get no outbound audio when dialing. Call shows the timer counting as if the call is progressing but absolutely no ring back and cannot hear the party on the other end when they answer.