In order to hard reset a dopod S300, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
dopod S300 device will be brought back to the default configuration of a brand new device.
1. Turn off the phone.
2. Press and hold Left and Right softkeys simultaneously.
3. Press Power button.
4. Wait for the "Press 0 to restore factory default" to appear. Do so.
5. Wait for the phone to reset and restart. Done.