In order to hard reset a dopod S900, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
dopod S900 device will be brought back to the default configuration of a brand new device.
1. Press and hold Enter and Volume Down softkeys simultaneously.
2. Insert the stylus into the hole in a location shown in the picture.
3. Wait for the phone to reset and restart. Done.