In order to hard reset a Samsung Galaxy Pop Plus S5570i, 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 Pop Plus S5570i 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: Power, Home. Release Power button when Samsung logo appears.
3. Let go of other buttons when Recovery Mode menu opens.
4. A new menu should now open. From it, select the Wipe data/factory reset option. To do so, use Volume buttons to scroll the menu and Power button to choose the option.
5. Now select, in the same way as above, Yes and Reboot system now.
6. Done!