If you’ve disabled an app and would like to enable it, you can find and re-enable the app using the following steps:
Go to Settings on your device.
Swipe to view the list of All apps.
Scroll to the bottom of the list to view disabled system apps.
Touch the system app from the list that you’d like to enable.
Once a system app has been re-enabled, it can be viewed and opened from your main apps screen.