Hard Reset LG F510L G Flex 2 - factory reset using settings

How to do the factory reset in the easiest way? How to Fully Erase Everything from LG F510L G Flex 2 ? The hard reset operation will restore your LG F510L G Flex 2 to the factory state. All settings, applications and data added by the user will be removed. More info: http://www.hardreset.info/devices/lg/lg-f510l-g-flex2/-2/