Force Quit a Stuck Application on the iPhone / iPod Touch
I love my iPhone but every once in a while you run into an app that misbehaves itself and seems to be stuck in some infinite loop of iPhone-frozen madness (WhitePages app I’m looking at you). Thankfully, you can force quit an application on your iPhone / iPod Touch by holding down the Home button for 10 seconds. I have noticed that after force quitting some applications the whole iPhone seems to have slowed down a bit, whether it’s from a memory leak or mystery cpu cycles, I have no idea, so I will often reboot the phone to get things back to normal again.
Force Quitting for iPhone users
1. Hold down the sleep button until the red “slide to power off” slider appears (don’t swipe it)
2. Release the sleep button, but then hold down the Home button until you see the “stuck” application disappear, and returns to the App icon menu screen.
[ iPhone 3GS tip is courtesy of reader Jim C. Thanks Jim! ]
Update: it turns out you can force quit any app this way, not just stuck apps.