How to factory Reset HTC Windows Phone 8S?
How to reset pattern lock HTC Windows Phone 8S?
How to restore default factory settings on HTC Windows Phone 8S?
How to reset user password on HTC Windows Phone 8S?
1. Turn the power off.
2. Press and hold the VOLUME DOWN button, and then briefly press the POWER button. Release the VOLUME DOWN button when you see an icon on the screen.
3. Then press the following hardware buttons in this sequence: VOLUME UP > VOLUME DOWN > POWER > VOLUME DOWN.
How to master reset the phone within phone menu ?
On the Start screen, slide to the left.
Tap Settings > about.
Tap reset your phone, and then tap yes.