was using my iPhone 3GS on airplane mode on my trip from Denver to Austin up to the point we had to put them away. I turned the screen off and put it in my pocket. At the time we landed I took out my phone again to find that my iPhone was unresponsive. I pressed the home button and it didn’t turn on the screen, so I assumed I actually shut if off. So I pressed the silver one at the top hoping my phone would turn on but that didn’t work either. Got home to plug in my iPhone to the charger and was unresponsive. Is there something I can do (other than going to the ATT store) to revive my phone? Or is my phone just totally dead now? (I had this phone since July.) Was working totally find up to that point.