Siri and I have always had a bit of a contentious relationship and I have noticed she periodically thinks I am talking to her when I am not. Last night I fell asleep with the TV on as white noise. 3am Siri started talking. Which woke me up in a panic as I was not expecting to hear a strange voice. So now I have another standard feature to turn off. I understand they were trying to compete with "okay Google" but it only works when the phone is plugged in, so it's disappointing. Ah well.