Hi, I got a new macbook recently and restored my iPhone totally and synced it with the book to update it. That all works fine. The only issue is that now, from time to time, the phone will go totally silent during the middle of a call. However, the call isn't dropped, because if I use speaker phone, I can hear the person and the person can hear me. During these periods, I can't even hear ringing when I call people, even though the call is being made. When they pick up, I can't hear them. Please, please, please help. It's the holidays, and I need to be in contact with folks. Thanks so much.