In order to hard reset a Elson EL590, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Elson EL590 device will be brought back to the default configuration of a brand new device.
1. Switch off the smartphone by pressing and holding the Power button.
2. Starting from the Home Screen, go to Menu, Settings, Reset and Master Reset.
3. Begin the hard reset process by tapping in the security code 1234.