For some strange reason, when someone calls me or I call them, I can't start talking right away after calling/answering, because my microphone isn't on yet, thus I have to wait 2-3 seconds before I can talk. I find this very annoying, having to repeat things over and over again. I did restore today, that obviously didn't help. It's a iPhone 5, iOS 7.1. I think that I didn't have this problem while on 7.0, but I am not 100% sure. Any suggestions?