How to Test Samsung Galaxy S7 Buttons


  • To test the phone's buttons with Samsung diagnostic test


  • Samsung Galaxy S7


  1. Open the Phone app
  2. Dial *#0*#
  3. Tap "Sub key"
  4. If working, pressing or tapping each button will change the screen color to:
    • Volume up, White
    • Volume down, Green
    • Power button, Red
    • Left of the Home button, Orange or Yellow
    • Home button, Blue
    • Right of the Home button (Back button), Purple
  5. To exit tap Back four times

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