In order to hard reset a Cube U20GT, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Cube U20GT device will be brought back to the default configuration of a brand new device.
1. Power up the phone: press-hold the Power button.
2. Starting from the Home Screen, open Menu and enter Settings.
3. Now select Reset and Master Reset. Yes to confirm.
4. Begin the hard reset by tapping in the safety code: 1234.