Hello!
After looking at the coverage map I see that there is coverage in south dakota, and T-Mobile coverage in Sioux Falls. Who would the service partner be? AT&T? As that is who I currently have but plan on dropping them as I use a lot of data and the $70/mo is quite appealing, I'm paying around $150/mo which is getting to be too much with college loans coming do.
I have friends in the area and they say the coverage is hit/miss, they're mostly on Wi-Fi anyway and also got the service because of the unlimited plan which AT&T/Verizon really seem to get on you once you pass your data caps which I can easily do daily.. With App Development, Pandora, Netflix, Hulu, and downloading games it does add up.
For anyone in the SD area, hows you're experience? I do plan on moving to MN which does have better coverage within 6-8 months and I know it's good where I'll be.