It doesn't seem to tell you what the voice signal strength is (just the "internet connection" strength). You'd think you'd get an idea of Voice Signal, Data Signal (GRPS, EDGE, 3G), and/or Wifi ... each as a separate gauge*. Other phones I've used do that, for example.

(Gauge being distinct from "Widget" -- you could probably fit all 3 gauges in one of those button-like widgets in that screen shot)