Is there anyone in Houston, TX that has a working 3G signal? I have edge as indicated by the little "E" in the top left but no "3G" symbol. Aren't you supposed to see that with 3G active? I live on the northwest side an am within at&t's coverage but no 3G signal. Also how dose GPS with maps work? I go to maps but don't get the glowing beacon when I hit locate me.