because it sucks and is a joke of a city... and i live here
(although getting the eff out soon)...
they probably figured not enough income per capita here to justify, or some crazy thing like that... one of the highest unemployments in the country...
although we gets me is I saw a list that had Grand Rapids on it... WTF???
oh - and detroit seems to have a major at&t presence... could be that sprint just can't negotiate enough towers to support 4G ???