In order to hard reset a Nokia 7100 Supernova, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Nokia 7100 Supernova device will be brought back to the default configuration of a brand new device.
1. Press Power button until the phone turns on.
2. Tap in this code: *#7370#
3. Press the Call button to confirm the hard reset process.
4. Allow your phone to reset and restart. That is all.