In a portable telephone, the front side of a back casing is covered with a front casing. At least two directional antennas of a base station receive data carrying signals originating from a mobile units positioned in an intra-site handover area defined by the overlapping radio coverage of the antennas. A light emitting diode array is mounted on a flexible circuit board and is configured to emit light at a color temperature range that matches the effective response of the solar panel. Thus, the transmit symbol clock and the receive symbol clock can be asynchronous. These approaches facilitate intelligent control of a processor’s clock frequency andor a fan’s speed so as to provide thermal andor power management for the computing device. 55% by weight of silicon and optionally up to about 0.