It looks like there are two speakers built into the bottom of the iPhone 4S. Are they supposed to be stereo? Not that I would sit here listening to music just by the built-in speakers alone, but I ask because I was watching a video clip and I covered the right speaker opening by mistake and all the sound cut out. So I got curious and tried a couple songs and videos and it seems that there is sound coming only from the right side speaker. Can anyone enlighten me on this?