In order to hard reset a Nokia Asha 201, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Nokia Asha 201 device will be brought back to the default configuration of a brand new device.
1. Start the phone by pressing and holding the Power button.
2. Using phone's keypad, type in this code: * + 3. Confirm with a Call button.
3. Wait for your phone to reset and restart. Done!