A method includes detecting, by a contact sensing layer, a position of one or more fingers of a mobile device user, the contact sensing layer is located in a back area of a mobile device and the one or more fingers of the mobile device user are in direct contact with the contact sensing layer, receiving the detected position of the one or more fingers, identifying a plurality of advanced features contained in at least one software application running on the mobile device, selecting a feedback type based on the plurality of advanced features, and sending the selected feedback type to an interactive layer of the mobile device causing the interactive layer to generate a notification which is detectable by the one or more fingers, the notification communicates at least one of the advanced features to the mobile device user.