Earlier today, I was texting one of my friends and when went to click on the banner, the messages app crashed. I thought that maybe quitting it would fix it, so I quit the app. Still frozen. I tried pulling down the notification center to at least see the message preview, and that completely crashed my phone. I did a hard reset 3 times and tried quitting every app to clear up ram, and it still wouldn't do anything. I ended up having to restore my phone. Now, my friend calls me and says he's having the same problem, so it seems to not just be my phone. I'm running iOS 6.1.3 on an iPhone 5 and he has 6.1.3 on a 4S. Has anyone had this issue or does anyone know why it occurs?