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The smart phone typically uses three main buttons from the left to the right:  

• Back Button
• Home Button
• Recent Apps Button (not used)
  

Back Button

The back button sends you to the previous screen that you were on. Sometimes when you select from a menu, you want to return from where you came. Other times, you can use this button to open the last application you had opened.

Home Button

The home button always takes you to the Home Screen, which is the main and first screen. No matter what you are doing, it will quickly escape and send you directly to the home screen.

Recent App Button

The button to the far right of the phone has been disabled and is not necessary to know how to use.