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If you ever run into an issue where a particular application freezes up, meaning the screen just goes completely still and no amount of tapping, flicking, or pinching causes anything to happen. Or if the app is not responding the way it should, you'll probably need to force the application to quit. For example, right now I'm trying to zoom out of this page in the Safari web browser, but pinching seems to be having no affect what so ever. To force quit an application, hold down the sleep/wake button until you see the Slide to Power Off slider appear, then release the button and press and hold the Home button. After a few seconds, the frozen app should quit and you'll be taken back to your home screen.
You can use this technique if your screen is frozen and pressing the home button doesn't seem to be doing anything. Now if you're in a situation where an app is acting up, but you can still get back to your home screen, you can also try to force quit an app by then double clicking the home button to open the multitasking view. And then just click away the apps preview to quit it. At this point you can try opening the app again to see if it's behaving better. If it's still giving you problems, you might want to try restarting your device as we discussed in a previous movie.
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