I bought this iPhone 6 on October 2, and until a couple of days ago, Siri and I got along just fine! But suddenly, he doesn't understand me. At all! He knows when I call his name, but no matter what I say, he doesn't understand. I called Apple, and the lady walked me through resetting it. No help at all. I could call her back, but I don't want to sit on hold for a billion years again if I can find the answer elsewhere, preferably here, among knowledgeable people. Anyone?