To Perform a Factory Reset:
1) Access the settings menu of your device
2) Scroll down in settings to the bottom where you will see the section called “System”, click to continue.
3) Go to “Advanced” to display the advanced options
4) Click on “Reset options” from this section it will allow us to restore network options, applications or reset the device.
5) Click on the last option called “Erase all data (factory reset)” or simply “Factory data reset”