Methods, systems, and computer program products for role- and locale-based mobile user device feature control are disclosed. The system comprises liquid crystal, electrochromic, suspended particle device, or NanoChromics display element attached to a part of a transparent body and a liquid crystal, electrochromic, suspended particle device, or NanoChromics display controlling semiconductor element controlling the operation of the display element. The user can then indicate which level of information he or she would like to transmit by using a different number of fingers to select the object or file. A support shaft is provided upright at a center portion of an outer wall, and a spherical portion is formed in the outer wall. The barrier layer stack is thinned or removed on the sidewalls of the gate cavity, to more precisely control the voltage threshold of the field effect transistor.