Messages are routed via a cellular communications network to multiple cellular communications receivers configured for answering calls placed to a common subscriber number, such that a message originated with a single cellular call may reach multiple recipients. The present compositions can reduce corrosion of a variety of surfaces including glass, aluminum, chrome, copper, and steel. The method includes steps of measuring a voltage of the signal converting device, and determining the switching power supply system being under the light load mode when the voltage of the signal converting device is smaller than a predetermined threshold voltage. This equalizing adaptive error signal is fed back and subtracted from the symbol integral stream to remove the varying DC component therefrom and thereby restore the information packet to a level DC bias condition. The method may include moving to a higher CPU frequency after a transient performance deadline has expired, entering an idle state, and resetting the transient performance deadline based on an effective transient budget.