HTC One mini User Manual page 135

135 Sync, backup, and reset
Performing a factory reset from settings
1. Go to Settings, and then tap Backup & reset.
2. Tap Reset phone.
3. If you also want to delete media and other data on HTC One mini, select Erase
all data.
4. Tap OK.
Performing a factory reset using hardware buttons
If you can't turn HTC One mini on or access settings, you can still perform a factory
reset by using the hardware buttons on HTC One mini.
The Fast boot option in Settings > Power must not be selected.
1. Press and hold the VOLUME DOWN button, and then press and hold the
POWER button.
2. Wait for the screen with the three Android images to appear, and then release
the POWER and VOLUME DOWN buttons.
3. Press VOLUME DOWN to select FACTORY RESET, and then press the POWER
button.