Reset/Reboot your iPhone

If your iPhone is totally unresponsive and force quitting an app did not help, try this.

Force a reset of your iPhone by pressing both the Sleep/Wake and Home buttons for at least ten seconds. Your iPhone would take a while to boot up. However, your data and settings should remain intact.

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Force quit an app on the iPhone

If  the app you’ve run has become unresponsive or has completely frozen, you can force quit the app by pressing the Home button for atleast 7 seconds. this should force exit the app.

This didn’t help? If your iPhone is still unresponsive try resetting.

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