The only interface customization you'll find here are the thumbnail overview of up to seven home screens (pinch anywhere on any home screen to toggle), as well as the "Pad Only" tab in the app drawer, the handy ASUS Quick Setting panel in the notification tray, and "ASUS customized setting" in system settings.
ENGADGET: ASUS PadFone 2 review: two times is a charm for this phone-in-tablet combo