Touch Optimize Wi-Fi usage in the Wi-Fi settings screen to customize the following settings.
Checkmark the box for Automatically turn on Wi-Fi while charging phone to set the device to automatically turn on Wi-Fi when connected to a power supply. If not checkmarked, Wi-Fi will not be turned on while charging. Touch Save to activate the setting.
Checkmark the box for When launching applications, connect to known Wi-Fi networks when Wi-Fi is off to set the device to automatically turn on and connect Wi-Fi when applications are launched. This setting is helpful for frequently used internet capable applications. Touch Save to activate the setting.