If you’re worried about coverage, look at a T-Mobile reseller instead of a T-Mobile MVNO: with a reseller, you get exactly the same coverage as you would from T-Mobile postpaid but at less of a cost.
That’s what I have. I signed up with 35orLess, a T-Mobile reseller, and was grandfathered in when they limited their client base to businesses only.
Over on Howardforums, there’s a lot of talk about Harbor Mobile, a new T-Mobile Reseller:
http://www.howardforums.com/showthread.php/1840227-HARBOR-MOBILE-New-T-Mobile-MVNO
According to that thread, Harbor Mobile is supposed to be for businesses only, but they’ll accept just about anyone if you claim to have a sole proprietorship or something.
Not exactly the most straightforward alternative, but I’d look into it if I wasn’t already on 35orLess.
Great news and link thanks!