iPhone 4s only producing mono sound Related to: iPhone 4S stereo sound

This is strange. I know people with the iPhone 4 (not the 4S as I have) who are getting audio from both "boxes". In addition, I don't get stereo with headphones either. I get stereo output but both L and R channels produce just R - meaning the R channel is outputting to both. What is this?
The fact that people say they are getting sound from both grills at the bottom of any iPhone is total nonsense, all models have a Microphone and a speaker at the bottom.

If Apple replaces the microphone with a speaker, the phone would be rendered useless as there would be no way of it picking up speech.

It is a very common misunderstanding. 

A couple of things to check.


Clean the headphone jack - any dust or fluff can cause the signal to break
Go to -Settings>general>accessability>Mono audio make sure this is off
Compare with a friend's phone, same model, same track, same head phones, then try new headphones, and after that a new song.
if there is still a problem go to an Apple store.