From the home screen, tap the Multitasking icon.
Recently accessed applications are displayed.
To remove an application from the list, tap and drag the application to the left or right. To clear the entire list, tap Clear all.
To close an application running in the background, tap and drag down the Notification bar.
Note: Removing an app from the list of recent apps may not close the application.
Tap the Settings icon.
Scroll to and tap Apps.
Swipe left to the RUNNING tab.
Running applications are now displayed.
To close a running application, scroll to and tap the application's name.
The application is now closed.