I've a friend who carries both a verizon and at&t phone. He regularly travels to Missouri. He says in certain areas of Missouri, his verizon phone gets no service (2g or 3g), while his at&t phone does. I'm not sure what phone he's using for each service. Anyone here from Missouri to confirm this?
I've seen the letters "SOS" on my ATT phone more times than I can count.
I'm in NY/NJ which is supposedly the most densely populated area in the US.