You’re surfing the Web, when all of a sudden Safari stops scrolling. You try tapping any of the on-screen buttons, but you can’t get a reaction. The app has become utterly unresponsive. This kind of situation is called an app freeze or crash. For whatever reason, the app has encountered an error it can’t recover from, and it’s stopped doing everything while it tries to figure out what the problem is and solve it (if it even can). Here some iPhone 4S Tips and Tricks.
iPhone 4S Tips and Tricks | To Force-Quit or Not to Force-Quit
If you don’t want to wait for the app to try to fix itself, you can tell it to force-quit. There are two ways to do this. If the app’s not completely frozen, and you can get to the home screen, you can double-click the Home button to bring up the multitasking shelf. Find your app’s icon and tap and hold it; after a moment, the icons start to wiggle and a little minus-sign button (–) appears in the upper left corner of each app. Tap the minus button of the unresponsive app, and it shuts down. You can then safely relaunch it from your home screen.
If your app is totally frozen and you can’t get to the home screen, hold down the On/Off button on the iPhone until the Slide To Power Off slider appears. Then release that button and hold down the Home button until the app exits.
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