In order to hard reset a HTC P3470, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
HTC P3470 device will be brought back to the default configuration of a brand new device.
1. First of all, power down the device.
2. Now press and hold the Softkeys.
3. Insert the stylus into the small hole at the bottom of the device.
4. Factory reset will now begin. Congrats.