Just wanted to know at what % of battery life will the phone operate when you plug it in to be recharged? I drained it all the way down to 0% and plugged it in. Then I tried to turn on the phone and use it while it was charging but couldn't get it to come on. Is there a specific % battery charge needed before it will come on? Hypothetically, what if there were an emergency and I had no battery life so I plugged it in to make a call. How long do I have to wait before it turns on? It's at 40% now and it's working plugged in. Do I just have to wait a couple of minutes or should it work instantly with 0%? Find it strange that it wasn't automatically responsive.