When a call is dropped, is there any way to know which person dropped the call? I know that the iphone displays "Call Failed" when a call drops, but that only shows briefly and it's not like I'm looking at my phone while I'm on a call. For example, I was driving the other day, my phone was in my pocket and I was using my bluetooth speakerphone. The call dropped and I had no way of knowing if it was me who dropped the call or if it was the person I was talking to. Is there an app or something that can keep a log of these things?