In order to hard reset a Elephone P8 3D, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Elephone P8 3D device will be brought back to the default configuration of a brand new device.
1. Power down the phone by pressing the Power button.
2. Now press'n'hold the Volume Up & Power buttons. Let go of them after a change occurs on the display.
3. Wait for the android logo to appear and press these buttons again.
4. Select the wipe data/factory reset option by navigating with Volume and Power buttons.
5. Now choose Yes.
6. Complete the hard reset process by selecting, again with Power button, reboot system now.
8. Well done! The hard reset operation will be completed for a short while.