In order to hard reset a Desay DS-M635, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Desay DS-M635 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.