I got a brand new Verizon iPhone 4S 16GB. I've had it for 1 week. I noticed the phone app is very flaky. 1. sometimes the phone won't go into it, basically I hit the button and nothing happens 2. other times I can't get out of it, all functions within the app work fine but it pressing home screen gets ignored. Killing the app won't help 3. when I leave this app on screen and it goes to sleep, when awoke, I slide the slider, punch in my code and screen is black. Pushing home brings me back to home screen Anybody else has issues with this app? It's been quite flaky in last few days and I'm surprised that's the case on a brand new phone.