HTC Flyer User Manual page 192

192 Update and reset
Performing a factory reset using the tablet buttons
If you can't turn on HTC Flyer or access the tablet settings, you can still perform a
factory reset by using the buttons on HTC Flyer.
The Fast boot option in Settings > Power must not be selected.
1. Press and hold the VOLUME DOWN button, and then briefly press the POWER
button.
2. Wait for the screen with the three Android images to appear, and then release
the VOLUME DOWN button.
3. Press VOLUME DOWN to select FACTORY RESET, and then press the POWER
button.