From the Home screen, drag down the Notification panel.
Tap the Settings icon.
Scroll to System.
Tap System.
Before you proceed, make sure to back up all photos, videos, and data you'd like to keep. When you factory reset your device, all your files will be deleted.
Tap Reset options.
Tap Erase all data.
Tap Erase all data again.
Tap Confirm.
You've completed the steps!
