HTC EVO 3D hard resetTo reset the EVO 3D using the device keys:
Important: Make sure to back up important data you have on the device before you reset it.
1. With the device turned off, press and hold the volume button down, and then press POWER.
2. When the device’s display turns on, release the volume button.
3. Use the volume button to select FACTORY RESET, and then press POWER. (All data will be deleted from the device.)
Resetting Your EVO 3D Device via menu
Resetting the device deletes all data, including downloaded applications, and resets the device back
to its initial state — the state before you turned on the device for the first time.
Press HOME , Applications/Menu > and tap Settings > SD & phone storage > Factory data reset > Reset phone.