HTC Thunderbolt

1st method

  • Press Home -> Menu and then select settings
  • Scroll down and select SD Card & Phone Storage
  • Go to Internal Phone Storage section and select Factory data reset
  • Select Reset Phone
  • Select Erase Everything to confirm


2nd method

  • Power off the phone
  • Press and hold Volume Down (Blue) and press the Power on (Yellow) for about 5 seconds
  • Wait for the screen with the three Android images to appear and then release Volume Down (Blue) and Power on (Yellow) buttons
  • With Volume Down (Blue) select Factory Reset and select it with Power on (Yellow)
HTC Thunderbolt Hard Reset
HTC Thunderbolt Hard Reset

Let us know if worked by leaving a comment :)