Don't ever ask "is coverage in X place" since you're talking about a whole area. You need to be specific where you want to know about coverage. Even in a town there may be areas that don't do well with coverage and not just with T-Mobile. There are areas that because of terrain you'll have trouble with any service. In short you need to be more specific about where you need to know coverage. You'll get some idea of coverage if you go to the carriers' coverage page. T-Mobile has detailed maps for typical coverage. However, they wouldn't have one as general as "northeast Georgia."
Moderator yahoogroups forum T-Mobile-US http://groups.yahoo.com/group/T-Mobile-US