A contaminant gas is removed from a feed gas in two absorption and stripping circuits operated in tandem. The first component has a recovery percentage R1 and the second component has a recovery percentage R2, wherein R1 is higher than R2. All of the visually coded bounded shapes display characteristic visual coding which is easily visually discernible from each adjacent one of the visually coded bounded shapes. The coating comprises a refractory metal and silicon, which together form a silicide. Radio technology preferences and display of associated technologies available to a multi-technology mobile device can be dynamically controlled on a per-call andor per-application basis.