martypantsROK writes "After nearly seven years of living abroad, I'm planning to return to the U.S. in early 2013. Last time I lived there, smart phones weren't out yet. Dropped calls were common, and poor reception (can you hear me now?) was an ad campaign. I'm used to South Korea's wicked speeds, both for internet and wireless networks, and I'm wondering what the Slashdot community believes to be best carrier in the U.S. Which is fastest? Which offers the best deal for lots of data? Nationwide roaming and coverage? Prices? Service?"