From the Home screen, drag down the Notification panel.
Drag down the Quick settings panel.
Tap the Settings icon.
Scroll to System.
Tap System.
Tap Reset options.
Resetting your network settings will reset all your Wi-Fi, cellular, and VPN settings.
Tap Reset Wi-Fi, mobile & Bluetooth.
Tap Reset settings.
Tap Reset settings again.
You've completed the steps!
