iPhone

• 1). Press the "Home" button twice from the home screen on your iPhone. The list of open apps appears on the screen.
  
  
• 2). Swipe the list to the right or left to navigate to the app that you want to close.
  
  
• 3). Tap the app that you want to close, then hold it until a red minus sign appears.
  
  
• 4). Tap the minus sign to close the app, then tap on the home screen.
  
  

BlackBerry

• 1). Navigate to the application you want to close on your BlackBerry.
  
  
• 2). Press the "BlackBerry" key.
  
  
• 3). Select "Close" from the pop-up menu to close the app.
  
  

Windows Mobile

• 1). Select "Start" on your Windows Mobile phone, then select "Settings."
  
  
• 2). Select "System," then select "Task Manager."
  
  
• 3). Select the app that you want to close from the list of apps, then select "End Task."