Samsung Galaxy S4 GT-I9508
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1st method

  • If your phone is frozen
  • Remove the battery
  • Reinsert the battery
  • Power on the phone

2nd method

  • If your phone is frozen
  • Press and hold Volume Down (Yellow) and Power on button (Blue)
  • When the phone reboots release the Volume Down (Yellow) and Power on button (Blue)

Samsung Galaxy S4 GT-I9508 Soft Reset

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Let us know if worked by leaving a comment :)