Factory reset on HTC Desire could be used in several cases:
- when your device is malfunctioning (also with viruses hard to remove),
- when you wish to clear the configuration and the settings of HTC Desire to the default setting,
- when you need more memory space on your device,
- when you plan to sell your HTC Desire and you wish to clear all your personal data,
- when you just want to start using your device from scratch.