In order to hard reset a Samsung N100, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Samsung N100 device will be brought back to the default configuration of a brand new device.
1. Make sure the phone is turned on.
2. Type in this code into the phone: *2767*3855#
3. Wait until the phone resets and reboots.