Sprint looks to be pretty bad in Detroit. Looking at a PC Mag review
of mobile networks from earlier this year, Spring had 3G speeds above 144kbps only 29% of the time in Detroit. This compares to AT&T beating 144 kbps 91% of the time and T-Mobile beating 144 kbps 99% of the time. Sprint/Virgin Mobile looks to be a poor choice in Detroit and T-Mobile seems to be a very strong option.