In order to hard reset a dopod D600, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
dopod D600 device will be brought back to the default configuration of a brand new device.
1. Turn off the phone.
2. Press and hold Power button. As you hold it, insert stylus into the hole on he bottom left.
3. Wait for the device to restart. Done!