Since shortly after last Thanksgiving, my wife and I been pulling our hair out over this phone issue. The batter drains like crazy, and at about 15%, the battery dies. Then it takes like 10 minutes to restart the phone while watching the screen say: "Optimizing App 1 of 1". You can image in an emergency, the phone suddenly becomes useless. This morning, for the 2nd time, it decided to lock up at about 63% power, then restart. It takes about 8% of power to start up in these conditions. But if your battery's dead, I need to charge it...