Has anyone else noticed that whenever you play, a video or music during a phone call. The quality of sound is very poor? This is with headphones and without. I don't get why the phone doesn't switch to higher quality, and even if it can't why is the quality of a phone call this bad in the first place? I know for a fact that the quality of audio can be better, because as soon as you hang up the call, the iPhone switches to high quality audio again.