In order to hard reset a Samsung Galaxy Express I8730, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Samsung Galaxy Express I8730 device will be brought back to the default configuration of a brand new device.
1. Turn off the phone by holding the Power button.
2. Press'n'hold these three buttons simultaneously: Volume Up, Power, Home. Let go of them when the Samsung logo appears.
3. Select the Wipe data/Factory reset option. Use Volume buttons to browse the menu and Power button to select the option.
4. Now select, in the same way as above, Yes and Reboot system now.
5. Done!