In order to hard reset a NEC e808y, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
NEC e808y device will be brought back to the default configuration of a brand new device.
1. Power up the phone.
2. Now press Menu button, enter Settings Menu and select Reset Settings.
3. Type in your security code (default codes can be 0000, 1234 or 000000).
4. Confirm the whole process. Done.