HTC Desire 512 User Manual page 110

110 Sync, backup, and reset
3. If you want to delete media, documents, and other data from the phone storage,
select Erase all data.
To also delete media and other data from your storage card, select Erase SD
card.
4. Tap OK.
Performing a factory reset using hardware buttons
If you can't turn HTC Desire 512 on or access settings, you can still perform a factory
reset by using the hardware buttons on HTC Desire 512.
The Fast boot option in Settings > Power must not be selected.
1. Remove the battery, wait for a few seconds, then reinsert the battery.
2. Press and hold the VOLUME DOWN button, and then press and hold the
POWER button.
3. Wait for the screen with the three Android images to appear, and then release
the POWER and VOLUME DOWN buttons.
4. Press VOLUME DOWN to select FACTORY RESET, and then press the POWER
button.