Probably out in the boonies where there's no 4G (or even 3G) service yet. They don't upgrade areas where no one human lives (chipmunks don't pay their bills), and very few people pass through. Remember, there are still some areas of the country in which there's no service at all - not even voice - so having even minimal data isn't the worst that can happen. (And if I read your name correctly, "no service at all" really means no service on only one of your communications devices, as far as you're concerned, right?)