I have noticed with the iOS 4 an issue when I have missed a call and someone is leaving a voicemail, the phone does not respond to any of the buttons. Guessing its a software glitch but in the meantime I am trying these steps. Please note this will erase any saved passwords for wifi access, so you will have to re enter them.
- Launch the Settings app
- Select General
- Select Reset
- Select Reset Network Settings
- Allow the iPhone to reboot
[Source]
Reason why? Well, its not official, but CrunchGear had an interesting post that shares a possible reason…
I know adult gamers do not care to play with 12 year olds, who sum up the average player on consoles it seems, and mouse and keyboard combo is what we like to use over the controllers.
“smoothly, even getting to the testing stages. That is, testing between console gamers over here and PC gamers over there. Console gamers would be using their standard controller and PC gamers would be using their standard mouse and keyboard.Every single time the PC gamer killed the console gamer. And I don’t mean killed as in “fragged,” but killed as in the PC gamer knocked the teeth out of the console gamers every single time.”
[Full article]