2-3 days ago, my iPhone went forom 100% to 50% by lunchtime -- and I barely touched it. The next day, I was at 9% by lunch time. Last night I reset to factory specs, and I'm still having issues. The weird thing is that my partner's iPhone4 is doing the exact same thing. He just got back from a meeting, and everyone at the other office -- with an old iPhone4 -- is having the same problem. Is this a battery issue? A software issue? A visus issue? I've already got an Apple Store appointment for tomorrow, but I'm starting to wonder.